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Proxy Squid Version 5.5 + Alma Linux 9.4

1. Proxy Squid Version 5.5 + Alma Linux 9.4

Flávio Ricardo
maoflaric
(usa CentOS)

Enviado em 24/09/2024 - 16:19h


Bom dia, tarde, noite,


Estou querendo subir um firewall iptables com serviço de proxy squid e dhcpd-server no SO Alma Linux 9.4. Todos os serviços estão funcionando normalmente, porém não consigo setar o proxy transparente o que seria bem melhor.
Alguém poderia me ajudar?
Vou por aqui o que já fiz no squid e no iptables.

#SQUID.CONF

#### Cabeçalho ####

http_port 172.17.10.1:3128
http_port 127.0.0.1:3128
visible_hostname fw-upa-cidoperaia-01

dns_nameservers 192.166.254.60
dns_nameservers 192.166.254.70

cache_mem 2048 MB
maximum_object_size_in_memory 512 MB
maximum_object_size 512 MB
minimum_object_size 0 MB
cache_swap_high 95
cache_swap_low 90
httpd_suppress_version_string on

cache_dir ufs /var/spool/squid 2048 16 256
error_directory /usr/share/squid/errors/pt-br
cache_log /var/log/squid/cache.log
access_log /var/log/squid/access.log

refresh_pattern ^ftp: 15 20% 2280
refresh_pattern ^gopher: 15 20% 2280
refresh_pattern . 15 20% 2280

#### Regras ACLs de bloqueio de sites ####

# sites liberados
acl sites_liberados url_regex -i "/etc/squid/sites_liberados"
http_access allow sites_liberados

acl SitesBloqueados url_regex -i "/etc/squid/SitesBloqueados"
http_access deny SitesBloqueados

acl SitesImproprios url_regex -i "/etc/squid/SitesImproprios"
http_access deny SitesImproprios

#### ACLs Portas ####

acl SSL_ports port 5938 # teamviewer
acl SSL_ports port 3389 # teamviewer
acl SSL_ports port 2200 # ssh
acl SSL_ports port 443 # https
acl SSL_ports port 444 # https
acl SSL_ports port 3001 # https
acl SSL_ports port 3002 # https
acl SSL_ports port 3003 # https
acl SSL_ports port 563 # snews
acl SSL_ports port 873 # rsync
acl SSL_ports port 8059 #
acl SSL_ports port 8050 #
acl SSL_ports port 8058 #
acl SSL_ports port 8061 # Sistema Ponto
acl SSL_ports port 2021 # Sistema Ponto
acl SSL_ports port 2022 # Sistema Ponto
acl SSL_ports port 3000 # Sistema Ponto
acl SSL_ports port 3001 # node socket sisupa
acl SSL_ports port 3002 # node socket sisupa
acl SSL_ports port 3003 # node socket sisupa
acl SSL_ports port 3005 # node socket sisupa
acl safe_ports port 5938 # teamviewer
acl Safe_ports port 3389 # teamviewer
acl Safe_ports port 2200 # ssh
acl Safe_ports port 80 # http
acl Safe_ports port 83 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 444 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl Safe_ports port 631 # cups
acl Safe_ports port 873 # rsync
acl Safe_ports port 901 # SWAT
acl Safe_ports port 8050 # Sistema Ponto
acl Safe_ports port 8058 # Sistema Ponto
acl Safe_ports port 8059 # Sistema Ponto
acl Safe_ports port 8061 # Sistema Ponto
acl Safe_ports port 2021 # Sistema Ponto
acl Safe_ports port 2022 # Sistema Ponto
acl Safe_ports port 3000 # Sistema Ponto
acl Safe_ports port 3001 # Sistema Ponto

acl porge method PURGE
acl CONNECT method CONNECT

http_access allow manager localhost
http_access deny manager
#http_access allow purge localhost
#http_access deny purge
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports

########## HIERARQUIA DE PROXY ###########

#SEATI PROXY
cache_peer 192.166.254.2 parent 3128 3130 no-query no-digest

#### Regra de acesso local ####

acl redelan src 172.17.10.0/24
http_access allow localhost
http_access allow redelan


http_access deny all


## Agora o script que fiz para o iptables

#!/bin/bash
# chkconfig: 2345 25 98

# SCRIPT DE FIREWALL COM GATEWAY NA REDE!

# DECLARANDO VARIAVEIS
IF_LOCAL="enp3s0" # interface local network
INTERNET="enp2s0" # external interface
LOCAL_NETWORK="172.17.10.0/24"
LOOPBACK="lo" # loopback interface

IPTABLES="/sbin/iptables" # Daemon of firewall

begin(){

# LIMPA (FLUSH) TODAS AS REGRAS DA TABELA DE FILTRAGEM
$IPTABLES -F
$IPTABLES -F INPUT
$IPTABLES -F OUTPUT
$IPTABLES -F FORWARD
$IPTABLES -F -t mangle
$IPTABLES -t mangle -X
$IPTABLES -F -t nat
$IPTABLES -X

# POLICIES DEFAULT
$IPTABLES -P INPUT DROP
$IPTABLES -P OUTPUT ACCEPT
$IPTABLES -P FORWARD DROP

# COMPARTILHANDO CONEXÃO
modprobe iptable_nat
echo 1 > /proc/sys/net/ipv4/ip_forward

# INICIO DE REGRAS APLICADAS COM DESTINO AO FIREWALL
$IPTABLES -A INPUT -i $LOOPBACK -j ACCEPT
$IPTABLES -A INPUT -i $INTERNET -p tcp --dport 2200 -j ACCEPT
$IPTABLES -A INPUT -i $IF_LOCAL -p tcp --dport 2200 -j ACCEPT
$IPTABLES -A INPUT -i $IF_LOCAL -p tcp --dport 3128 -s $LOCAL_NETWORK -d 172.17.10.1 -j ACCEPT
$IPTABLES -A INPUT -i $INTERNET -p udp --dport 53 -j ACCEPT
$IPTABLES -A INPUT -i $INTERNET -p udp --dport 161 -j ACCEPT
$IPTABLES -A INPUT -i $INTERNET -p icmp -j ACCEPT


# INICIO DE REGRAS PARA REDE LOCAL
$IPTABLES -A FORWARD -i $IF_LOCAL -p udp --dport 53 -s $LOCAL_NETWORK -j ACCEPT
$IPTABLES -A FORWARD -i $IF_LOCAL -p icmp -j ACCEPT

# RULES FOR SNAT
$IPTABLES -t nat -A POSTROUTING -o $INTERNET -s $LOCAL_NETWORK -j SNAT --to-source 10.70.7.5
$IPTABLES -A FORWARD -p tcp -m tcp -m multiport --dports 53,389,636,135,139,445,110,995,25,465,587 -j ACCEPT
$IPTABLES -A FORWARD -p udp -m udp -m multiport --dports 53,389,636 -j ACCEPT

# TERMINO REGRAS PARA REDE LOCAL
# ESTABILIZANDO CONEXÕES
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
$IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT

echo "INICIANDO O FIREWALL..."
}
stop(){
$IPTABLES -F
$IPTABLES -F -t nat
$IPTABLES -t mangle -F
$IPTABLES -P INPUT ACCEPT
$IPTABLES -P FORWARD ACCEPT
$IPTABLES -P OUTPUT ACCEPT
$IPTABLES -X
echo "FIREWALL PARADO, REDE DESPROTEGIDA"
}

case "$1" in
"start") begin ;;
"stop") stop ;;
"restart") stop; begin ;;
*) echo "Use os parametros start ou stop"
esac


### Alguma dica de regra que eu possa aplicar para o proxy transparent?

Desde já agradeço.

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    •   


    2. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Daniel Lara Souza
    danniel-lara
    (usa Fedora)

    Enviado em 25/09/2024 - 17:52h


    add essa linha no seu squid.conf


    
http_port 3128 intercept   # TRANSPARENT PROXY


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    • 3. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Flávio Ricardo
    maoflaric
    (usa CentOS)

    Enviado em 01/10/2024 - 17:49h


    danniel-lara escreveu:


    add essa linha no seu squid.conf


    
http_port 3128 intercept   # TRANSPARENT PROXY



    Olá!!!

    Não deu certo, já tinha testado antes e testei novamente. Ainda tem que setar o proxy no PC para navegar ainda.


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    • 4. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Buckminster
    Buckminster
    (usa Debian)

    Enviado em 03/10/2024 - 08:50h

    No Squid
    http_port 172.17.10.1:3128 intercept
    http_port 127.0.0.1:3128 intercept

    No Iptables
    Faça as alterações abaixo e teste.

    Acrescente a linha na seguinte posição:
    $IPTABLES -A INPUT -i $LOOPBACK -j ACCEPT
    $IPTABLES -A OUTPUT -i $LOOPBACK -j ACCEPT <<< essa linha

    Comente as linhas abaixo:
    # RULES FOR SNAT
    $IPTABLES -t nat -A POSTROUTING -o $INTERNET -s $LOCAL_NETWORK -j SNAT --to-source 10.70.7.5
    $IPTABLES -A FORWARD -p tcp -m tcp -m multiport --dports 53,389,636,135,139,445,110,995,25,465,587 -j ACCEPT
    $IPTABLES -A FORWARD -p udp -m udp -m multiport --dports 53,389,636 -j ACCEPT

    # TERMINO REGRAS PARA REDE LOCAL
    # ESTABILIZANDO CONEXÕES
    $IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
    $IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT


    E coloque essas no lugar:
    # PERMITIR TRÁFEGO HTTP E REDIRECIONÁ-LO PARA O PROXY
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 80 -j REDIRECT --to-port 3128
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 443 -j REDIRECT --to-port 3128

    # Permitir o tráfego do Squid para a internet
    $IPTABLES -t nat -A POSTROUTING -s 172.17.10.0/24 -o $IF_LOCAL -j MASQUERADE

    # Bloquear acesso ao Squid para IPs externos (esta regra é opcional no teu caso, é somente uma segurança adicional)
    $IPTABLES -A INPUT -p tcp --dport 3128 -s ! 127.0.0.1 -j DROP

    # PERMITIR ACESSO AO SQUID
    $IPTABLES -A INPUT -p tcp --dport 3128 -j ACCEPT

    # PERMITIR ENCAMINHAMENTO
    $IPTABLES -A FORWARD -i $IF_LOCAL -o $INTERNET -j ACCEPT
    $IPTABLES -A FORWARD -i $INTERNET -o $IF_LOCAL -m state --state ESTABLISHED,RELATED -j ACCEPT

    Faça as alterações e reinicie e teste.
    Tenha o cuidado de não se perder nas alterações. Sugiro fazer um backup do teu script, fazer um novo com as alterações e testar, mas fica a seu critério.


    _________________________________________________________
    Always listen the Buck!
    Enquanto o cursor estiver pulsando, há vida!

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    • 5. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Flávio Ricardo
    maoflaric
    (usa CentOS)

    Enviado em 03/10/2024 - 09:15h


    Buckminster escreveu:

    No Squid
    http_port 172.17.10.1:3128 intercept
    http_port 127.0.0.1:3128 intercept

    No Iptables
    Faça as alterações abaixo e teste.

    Acrescente a linha na seguinte posição:
    $IPTABLES -A INPUT -i $LOOPBACK -j ACCEPT
    $IPTABLES -A OUTPUT -i $LOOPBACK -j ACCEPT <<< essa linha

    Comente as linhas abaixo:
    # RULES FOR SNAT
    $IPTABLES -t nat -A POSTROUTING -o $INTERNET -s $LOCAL_NETWORK -j SNAT --to-source 10.70.7.5
    $IPTABLES -A FORWARD -p tcp -m tcp -m multiport --dports 53,389,636,135,139,445,110,995,25,465,587 -j ACCEPT
    $IPTABLES -A FORWARD -p udp -m udp -m multiport --dports 53,389,636 -j ACCEPT

    # TERMINO REGRAS PARA REDE LOCAL
    # ESTABILIZANDO CONEXÕES
    $IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
    $IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT


    E coloque essas no lugar:
    # PERMITIR TRÁFEGO HTTP E REDIRECIONÁ-LO PARA O PROXY
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 80 -j REDIRECT --to-port 3128
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 443 -j REDIRECT --to-port 3128

    # Permitir o tráfego do Squid para a internet
    $IPTABLES -t nat -A POSTROUTING -s 172.17.10.0/24 -o $IF_LOCAL -j MASQUERADE

    # Bloquear acesso ao Squid para IPs externos (esta regra é opcional no teu caso, é somente uma segurança adicional)
    $IPTABLES -A INPUT -p tcp --dport 3128 -s ! 127.0.0.1 -j DROP

    # PERMITIR ACESSO AO SQUID
    $IPTABLES -A INPUT -p tcp --dport 3128 -j ACCEPT

    # PERMITIR ENCAMINHAMENTO
    $IPTABLES -A FORWARD -i $IF_LOCAL -o $INTERNET -j ACCEPT
    $IPTABLES -A FORWARD -i $INTERNET -o $IF_LOCAL -m state --state ESTABLISHED,RELATED -j ACCEPT

    Faça as alterações e reinicie e teste.
    Tenha o cuidado de não se perder nas alterações. Sugiro fazer um backup do teu script, fazer um novo com as alterações e testar, mas fica a seu critério.


    _________________________________________________________
    Always listen the Buck!
    Enquanto o cursor estiver pulsando, há vida!




    Bom dia, vou realizar e testar e volto para confirmar para sim ou para não, mesmo assim agradeço o tempo.


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    • 6. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Flávio Ricardo
    maoflaric
    (usa CentOS)

    Enviado em 03/10/2024 - 14:55h


    Buckminster escreveu:

    No Squid
    http_port 172.17.10.1:3128 intercept
    http_port 127.0.0.1:3128 intercept

    No Iptables
    Faça as alterações abaixo e teste.

    Acrescente a linha na seguinte posição:
    $IPTABLES -A INPUT -i $LOOPBACK -j ACCEPT
    $IPTABLES -A OUTPUT -i $LOOPBACK -j ACCEPT <<< essa linha

    Comente as linhas abaixo:
    # RULES FOR SNAT
    $IPTABLES -t nat -A POSTROUTING -o $INTERNET -s $LOCAL_NETWORK -j SNAT --to-source 10.70.7.5
    $IPTABLES -A FORWARD -p tcp -m tcp -m multiport --dports 53,389,636,135,139,445,110,995,25,465,587 -j ACCEPT
    $IPTABLES -A FORWARD -p udp -m udp -m multiport --dports 53,389,636 -j ACCEPT

    # TERMINO REGRAS PARA REDE LOCAL
    # ESTABILIZANDO CONEXÕES
    $IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
    $IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT


    E coloque essas no lugar:
    # PERMITIR TRÁFEGO HTTP E REDIRECIONÁ-LO PARA O PROXY
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 80 -j REDIRECT --to-port 3128
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 443 -j REDIRECT --to-port 3128

    # Permitir o tráfego do Squid para a internet
    $IPTABLES -t nat -A POSTROUTING -s 172.17.10.0/24 -o $IF_LOCAL -j MASQUERADE

    # Bloquear acesso ao Squid para IPs externos (esta regra é opcional no teu caso, é somente uma segurança adicional)
    $IPTABLES -A INPUT -p tcp --dport 3128 -s ! 127.0.0.1 -j DROP

    # PERMITIR ACESSO AO SQUID
    $IPTABLES -A INPUT -p tcp --dport 3128 -j ACCEPT

    # PERMITIR ENCAMINHAMENTO
    $IPTABLES -A FORWARD -i $IF_LOCAL -o $INTERNET -j ACCEPT
    $IPTABLES -A FORWARD -i $INTERNET -o $IF_LOCAL -m state --state ESTABLISHED,RELATED -j ACCEPT

    Faça as alterações e reinicie e teste.
    Tenha o cuidado de não se perder nas alterações. Sugiro fazer um backup do teu script, fazer um novo com as alterações e testar, mas fica a seu critério.


    _________________________________________________________
    Always listen the Buck!
    Enquanto o cursor estiver pulsando, há vida!






    Boa tarde, realizei as mudanças como mostrou porém há alguns erros do squid e do iptables:

    ### Mensagem do journalctl -xeu squid.service

    The unit squid.service has entered the 'failed' state with result 'exit-code'.
    out 03 14:33:40 fw systemd[1]: Failed to start Squid caching proxy.
    &#9617;&#9617; Subject: A unidade squid.service falhou
    &#9617;&#9617; Defined-By: systemd
    &#9617;&#9617; Support: https://support.oracle.com
    &#9617;&#9617;
    &#9617;&#9617; A unidade squid.service falhou.
    &#9617;&#9617;
    &#9617;&#9617; O resultado é failed.
    out 03 14:46:22 fw systemd[1]: Starting Squid caching proxy...
    &#9617;&#9617; Subject: Unidade squid.service sendo iniciado
    &#9617;&#9617; Defined-By: systemd
    &#9617;&#9617; Support: https://support.oracle.com
    &#9617;&#9617;
    &#9617;&#9617; A unidade squid.service está sendo iniciada.
    out 03 14:46:22 fw squid[1933]: 2024/10/03 14:46:22| Warning: empty ACL: acl SitesPermitidos url_regex -i "/etc/squid/SitesPermitidos"
    out 03 14:46:22 fw squid[1933]: 2024/10/03 14:46:22| Warning: empty ACL: acl SitesBloqueados url_regex -i "/etc/squid/SitesBloqueados"
    out 03 14:46:22 fw squid[1933]: 2024/10/03 14:46:22| Warning: empty ACL: acl SitesImproprios url_regex -i "/etc/squid/SitesImproprios"
    out 03 14:46:22 fw squid[1933]: Squid Parent: will start 1 kids
    out 03 14:46:22 fw squid[1933]: Squid Parent: (squid-1) process 1936 started
    out 03 14:46:22 fw (squid-1)[1936]: FATAL: mimeLoadIcon: cannot parse internal URL: http://fw:0/squid-internal-static/icons/silk/image.png
    out 03 14:46:22 fw squid[1933]: Squid Parent: squid-1 process 1936 exited with status 1
    out 03 14:46:22 fw squid[1933]: Squid Parent: (squid-1) process 1939 started
    out 03 14:46:23 fw (squid-1)[1939]: FATAL: mimeLoadIcon: cannot parse internal URL: http://fw:0/squid-internal-static/icons/silk/image.png
    out 03 14:46:23 fw squid[1933]: Squid Parent: squid-1 process 1939 exited with status 1
    out 03 14:46:23 fw squid[1933]: Squid Parent: (squid-1) process 1942 started
    out 03 14:46:23 fw (squid-1)[1942]: FATAL: mimeLoadIcon: cannot parse internal URL: http://fw:0/squid-internal-static/icons/silk/image.png
    out 03 14:46:23 fw squid[1933]: Squid Parent: squid-1 process 1942 exited with status 1
    out 03 14:46:23 fw squid[1933]: Squid Parent: (squid-1) process 1945 started
    out 03 14:46:23 fw (squid-1)[1945]: FATAL: mimeLoadIcon: cannot parse internal URL: http://fw:0/squid-internal-static/icons/silk/image.png
    out 03 14:46:23 fw squid[1933]: Squid Parent: squid-1 process 1945 exited with status 1
    out 03 14:46:23 fw squid[1933]: Squid Parent: (squid-1) process 1948 started
    out 03 14:46:24 fw (squid-1)[1948]: FATAL: mimeLoadIcon: cannot parse internal URL: http://fw:0/squid-internal-static/icons/silk/image.png
    out 03 14:46:24 fw squid[1933]: Squid Parent: squid-1 process 1948 exited with status 1
    out 03 14:46:24 fw squid[1933]: Squid Parent: squid-1 process 1948 will not be restarted for 3600 seconds due to repeated, frequent failures
    out 03 14:46:24 fw squid[1933]: Exiting due to repeated, frequent failures
    out 03 14:46:24 fw systemd[1]: squid.service: Main process exited, code=exited, status=1/FAILURE
    &#9617;&#9617; Subject: Unit process exited
    &#9617;&#9617; Defined-By: systemd
    &#9617;&#9617; Support: https://support.oracle.com
    &#9617;&#9617;
    &#9617;&#9617; An ExecStart= process belonging to unit squid.service has exited.
    &#9617;&#9617;
    &#9617;&#9617; The process' exit code is 'exited' and its exit status is 1.
    out 03 14:46:24 fw systemd[1]: squid.service: Failed with result 'exit-code'.
    &#9617;&#9617; Subject: Unit failed
    &#9617;&#9617; Defined-By: systemd
    &#9617;&#9617; Support: https://support.oracle.com
    &#9617;&#9617;
    &#9617;&#9617; The unit squid.service has entered the 'failed' state with result 'exit-code'.
    out 03 14:46:24 fw systemd[1]: Failed to start Squid caching proxy.
    &#9617;&#9617; Subject: A unidade squid.service falhou
    &#9617;&#9617; Defined-By: systemd
    &#9617;&#9617; Support: https://support.oracle.com
    &#9617;&#9617;
    &#9617;&#9617; A unidade squid.service falhou.
    &#9617;&#9617;
    &#9617;&#9617; O resultado é failed.


    OBS: Eu já tinha tentado setar intercept na linha recomendada, mas sempre o serviço do squid dá esse erro. Eu tirando intercept o squid funciona normal.


    ### Fim da mensagem de err squid ###

    ### Erro iptables ###
    Ao executar o script aparece o seguinte erro

    ptables v1.8.10 (nf_tables): Can't use -i with OUTPUT

    Try `iptables -h' or 'iptables --help' for more information.
    Bad argument `127.0.0.1'
    Try `iptables -h' or 'iptables --help' for more information.
    INICIANDO O FIREWALL...













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    • 7. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Buckminster
    Buckminster
    (usa Debian)

    Enviado em 03/10/2024 - 16:30h

    Pode tirar essa linha:
    IPTABLES -A OUTPUT -o $LOOPBACK -j ACCEPT

    out 03 14:46:22 fw squid[1933]: 2024/10/03 14:46:22| Warning: empty ACL: acl SitesPermitidos url_regex -i "/etc/squid/SitesPermitidos"
    Aí está dizendo que as ACLs estão vazias, provavelmente tem nada dentro dos arquivos ou a sintaxe está errada.

    out 03 14:46:22 fw (squid-1)[1936]: FATAL: mimeLoadIcon: cannot parse internal URL: http://fw:0/squid-internal-static/icons/silk/image.png
    out 03 14:46:22 fw squid[1933]: Squid Parent: squid-1 process 1936 exited with status 1
    Esse erro aí em cima é da porta, estranho.

    Testa assim no Squid:
    http_port 172.17.10.1:3128 intercept

    e depois
    http_port 172.17.10.1:3129 intercept
    Comenta a linha com 127.0.0.1, deixa só uma com intercept.


    O Iptables desfaça as alterações e deixa tuas configurações.
    Reinicie os dois e teste.

    Caso persistir o erro, execute:
    # squid -NCd1

    E posta a saída aqui.

    Segue exemplo tirado do squid-cache:
    iptables -t nat -A OUTPUT --match owner --uid-owner squid -p tcp --dport 80 -j ACCEPT
    iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination SQUIDIP:3129

    http_port 3129 intercept

    https://wiki.squid-cache.org/ConfigExamples/Intercept/AtSource">https://wiki.squid-cache.org/ConfigExamples/Intercept/AtSource
    https://wiki.squid-cache.org/ConfigExamples/Intercept/LinuxRedirect">https://wiki.squid-cache.org/ConfigExamples/Intercept/LinuxRedirect
    https://wiki.squid-cache.org/ConfigExamples/

    Os links estão indo quebrados, é problema no VOL.

    _________________________________________________________
    Always listen the Buck!
    Enquanto o cursor estiver pulsando, há vida!

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    • 8. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Flávio Ricardo
    maoflaric
    (usa CentOS)

    Enviado em 03/10/2024 - 16:55h


    Buckminster escreveu:

    Pode tirar essa linha:
    IPTABLES -A OUTPUT -o $LOOPBACK -j ACCEPT

    out 03 14:46:22 fw squid[1933]: 2024/10/03 14:46:22| Warning: empty ACL: acl SitesPermitidos url_regex -i "/etc/squid/SitesPermitidos"
    Aí está dizendo que as ACLs estão vazias, provavelmente tem nada dentro dos arquivos ou a sintaxe está errada.

    out 03 14:46:22 fw (squid-1)[1936]: FATAL: mimeLoadIcon: cannot parse internal URL: http://fw:0/squid-internal-static/icons/silk/image.png
    out 03 14:46:22 fw squid[1933]: Squid Parent: squid-1 process 1936 exited with status 1
    Esse erro aí em cima é da porta, estranho.

    Testa assim no Squid:
    http_port 172.17.10.1:3128 intercept

    e depois
    http_port 172.17.10.1:3129 intercept
    Comenta a linha com 127.0.0.1, deixa só uma com intercept.


    O Iptables desfaça as alterações e deixa tuas configurações.
    Reinicie os dois e teste.

    Caso persistir o erro, execute:
    # squid -NCd1

    E posta a saída aqui.

    Segue exemplo tirado do squid-cache:
    iptables -t nat -A OUTPUT --match owner --uid-owner squid -p tcp --dport 80 -j ACCEPT
    iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination SQUIDIP:3129

    http_port 3129 intercept

    https://wiki.squid-cache.org/ConfigExamples/Intercept/AtSource">https://wiki.squid-cache.org/ConfigExamples/Intercept/AtSource
    https://wiki.squid-cache.org/ConfigExamples/Intercept/LinuxRedirect">https://wiki.squid-cache.org/ConfigExamples/Intercept/LinuxRedirect
    https://wiki.squid-cache.org/ConfigExamples/

    Os links estão indo quebrados, é problema no VOL.

    _________________________________________________________
    Always listen the Buck!
    Enquanto o cursor estiver pulsando, há vida!



    2024/10/03 16:54:55| Warning: empty ACL: acl SitesPermitidos url_regex -i "/etc/squid/SitesPermitidos"
    2024/10/03 16:54:55| Warning: empty ACL: acl SitesBloqueados url_regex -i "/etc/squid/SitesBloqueados"
    2024/10/03 16:54:55| Warning: empty ACL: acl SitesImproprios url_regex -i "/etc/squid/SitesImproprios"
    2024/10/03 16:54:55| Current Directory is /root
    2024/10/03 16:54:55| Starting Squid Cache version 5.5 for x86_64-redhat-linux-gnu...
    2024/10/03 16:54:55| Service Name: squid
    2024/10/03 16:54:55| Process ID 1832
    2024/10/03 16:54:55| Process Roles: master worker
    2024/10/03 16:54:55| With 1024 file descriptors available
    2024/10/03 16:54:55| Initializing IP Cache...
    2024/10/03 16:54:55| DNS Socket created at [::], FD 8
    2024/10/03 16:54:55| DNS Socket created at 0.0.0.0, FD 9
    2024/10/03 16:54:55| Adding nameserver 192.166.254.60 from squid.conf
    2024/10/03 16:54:55| Adding nameserver 192.166.254.70 from squid.conf
    2024/10/03 16:54:55| Logfile: opening log /var/log/squid/access.log
    2024/10/03 16:54:55| WARNING: log name now starts with a module name. Use 'stdio:/var/log/squid/access.log'
    2024/10/03 16:54:55| Unlinkd pipe opened on FD 14
    2024/10/03 16:54:55| Local cache digest enabled; rebuild/rewrite every 3600/3600 sec
    2024/10/03 16:54:55| Store logging disabled
    2024/10/03 16:54:55| Swap maxSize 2097152 + 2097152 KB, estimated 322638 objects
    2024/10/03 16:54:55| Target number of buckets: 16131
    2024/10/03 16:54:55| Using 16384 Store buckets
    2024/10/03 16:54:55| Max Mem size: 2097152 KB
    2024/10/03 16:54:55| Max Swap size: 2097152 KB
    2024/10/03 16:54:55| Rebuilding storage in /var/spool/squid (dirty log)
    2024/10/03 16:54:55| Using Least Load store dir selection
    2024/10/03 16:54:55| Current Directory is /root
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| ERROR: No forward-proxy ports configured.
    2024/10/03 16:54:55| Not currently OK to rewrite swap log.
    2024/10/03 16:54:55| storeDirWriteCleanLogs: Operation aborted.
    2024/10/03 16:54:55| FATAL: mimeLoadIcon: cannot parse internal URL: http://fw:0/squid-internal-static/icons/silk/image.png
    2024/10/03 16:54:55| Squid Cache (Version 5.5): Terminated abnormally.
    2024/10/03 16:54:55| Removing PID file (/run/squid.pid)



    0 0
  • Quote

    • 9. ta quase

    Flávio Ricardo
    maoflaric
    (usa CentOS)

    Enviado em 03/10/2024 - 17:14h

    Fiz umas mudanças.

    e ficou assim


    ### Script iptables ###


    #!/bin/bash
    # chkconfig: 2345 25 98

    # SCRIPT DE FIREWALL COM GATEWAY NA REDE!

    # DECLARANDO VARIAVEIS
    IF_LOCAL="enp1s0" # interface local network
    INTERNET="enp4s0f0" # external interface
    LOCAL_NETWORK="172.20.90.0/24"
    LOOPBACK="lo" # loopback interface

    IPTABLES="/sbin/iptables" # Daemon of firewall

    begin(){

    # LIMPA (FLUSH) TODAS AS REGRAS DA TABELA DE FILTRAGEM
    $IPTABLES -F
    $IPTABLES -F INPUT
    $IPTABLES -F OUTPUT
    $IPTABLES -F FORWARD
    $IPTABLES -F -t mangle
    $IPTABLES -t mangle -X
    $IPTABLES -F -t nat
    $IPTABLES -X

    # POLICIES DEFAULT
    $IPTABLES -P INPUT DROP
    $IPTABLES -P OUTPUT ACCEPT
    $IPTABLES -P FORWARD DROP

    # COMPARTILHANDO CONEXÃO
    modprobe iptable_nat
    echo 1 > /proc/sys/net/ipv4/ip_forward

    # INICIO DE REGRAS APLICADAS COM DESTINO AO FIREWALL
    $IPTABLES -A INPUT -i $LOOPBACK -j ACCEPT
    $IPTABLES -A INPUT -i $INTERNET -p tcp --dport 2200 -j ACCEPT
    $IPTABLES -A INPUT -i $IF_LOCAL -p tcp --dport 2200 -j ACCEPT
    $IPTABLES -A INPUT -i $IF_LOCAL -p tcp --dport 3128 -s $LOCAL_NETWORK -d 172.20.90.1 -j ACCEPT
    $IPTABLES -A INPUT -i $INTERNET -p udp --dport 53 -j ACCEPT
    $IPTABLES -A INPUT -i $INTERNET -p udp --dport 161 -j ACCEPT
    $IPTABLES -A INPUT -i $INTERNET -p icmp -j ACCEPT

    # TERMINO DE REGRAS APLICADAS COM DESTINO AO FIREWALL

    # INICIO DE REGRAS PARA REDE LOCAL
    $IPTABLES -A FORWARD -i $IF_LOCAL -p udp --dport 53 -s $LOCAL_NETWORK -j ACCEPT
    $IPTABLES -A FORWARD -i $IF_LOCAL -p icmp -j ACCEPT

    # RULES FOR SNAT
    $IPTABLES -t nat -A POSTROUTING -o $INTERNET -s $LOCAL_NETWORK -j SNAT --to-source 172.19.4.234

    $IPTABLES -A FORWARD -p tcp -m tcp -m multiport --dports 53,389,636,135,139,445,110,995,25,465,587 -j ACCEPT
    $IPTABLES -A FORWARD -p udp -m udp -m multiport --dports 53,389,636 -j ACCEPT

    # TERMINO REGRAS PARA REDE LOCAL

    # ESTABILIZANDO CONEXÕES
    $IPTABLES -I INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
    $IPTABLES -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT

    # REGRAS PARA O PROXY SQUID TRANSPARENTE
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 80 -j REDIRECT --to-port 3128
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 443:wq -j REDIRECT --to-port 3128

    echo "INICIANDO O FIREWALL..."
    }

    stop(){
    $IPTABLES -F
    $IPTABLES -F -t nat
    $IPTABLES -t mangle -F
    $IPTABLES -P INPUT ACCEPT
    $IPTABLES -P FORWARD ACCEPT
    $IPTABLES -P OUTPUT ACCEPT
    $IPTABLES -X
    echo "FIREWALL PARADO, REDE DESPROTEGIDA"
    }

    case "$1" in
    "start") begin ;;
    "stop") stop ;;
    "restart") stop; begin ;;
    *) echo "Use os parametros start ou stop"
    esac

    ### squid.conf ###

    #### Cabeçalho ####
    # Squid Cache: Version 5.5 #

    # Alterar a porta para escutar no tráfego transparente (apenas uma porta)
    http_port 172.20.90.1:3128 intercept
    http_port 127.0.0.1:3128

    visible_hostname fw

    dns_nameservers 192.166.254.60 192.166.254.70

    cache_mem 2048 MB
    maximum_object_size_in_memory 512 MB
    maximum_object_size 512 MB
    minimum_object_size 0 MB
    cache_swap_high 95
    cache_swap_low 90
    httpd_suppress_version_string on

    cache_dir ufs /var/spool/squid 2048 16 256
    error_directory /usr/share/squid/errors/pt-br
    cache_log /var/log/squid/cache.log
    access_log /var/log/squid/access.log

    refresh_pattern ^ftp: 15 20% 2280
    refresh_pattern ^gopher: 15 20% 2280
    refresh_pattern . 15 20% 2280

    #### Regras ACLs de bloqueio de sites ####

    acl SitesPermitidos url_regex -i "/etc/squid/SitesPermitidos"
    http_access allow SitesPermitidos

    acl SitesBloqueados url_regex -i "/etc/squid/SitesBloqueados"
    http_access deny SitesBloqueados

    acl SitesImproprios url_regex -i "/etc/squid/SitesImproprios"
    http_access deny SitesImproprios

    #### ACLs Portas ####

    acl SSL_ports port 443 # https
    acl SSL_ports port 444 # https
    acl SSL_ports port 3001 # https
    acl SSL_ports port 3002 # https
    acl SSL_ports port 3003 # https
    acl SSL_ports port 563 # snews
    acl SSL_ports port 873 # rsync
    acl SSL_ports port 8059 #
    acl SSL_ports port 8050 #
    acl SSL_ports port 8058 #
    acl SSL_ports port 8061 # Sistema Ponto
    acl SSL_ports port 2021 # Sistema Ponto
    acl SSL_ports port 2022 # Sistema Ponto
    acl SSL_ports port 3000 # Sistema Ponto
    acl Safe_ports port 80 # http
    acl Safe_ports port 83 # http
    acl Safe_ports port 21 # ftp
    acl Safe_ports port 443 # https
    acl Safe_ports port 444 # https
    acl Safe_ports port 70 # gopher
    acl Safe_ports port 210 # wais
    acl Safe_ports port 1025-65535 # unregistered ports
    acl Safe_ports port 280 # http-mgmt
    acl Safe_ports port 488 # gss-http
    acl Safe_ports port 591 # filemaker
    acl Safe_ports port 777 # multiling http
    acl Safe_ports port 631 # cups
    acl Safe_ports port 873 # rsync
    acl Safe_ports port 901 # SWAT
    acl Safe_ports port 8050 # Sistema Ponto
    acl Safe_ports port 8058 # Sistema Ponto
    acl Safe_ports port 8059 # Sistema Ponto
    acl Safe_ports port 8061 # Sistema Ponto
    acl Safe_ports port 2021 # Sistema Ponto
    acl Safe_ports port 2022 # Sistema Ponto
    acl Safe_ports port 3000 # Sistema Ponto
    acl Safe_ports port 3001 # Sistema Ponto
    acl porge method PURGE
    acl CONNECT method CONNECT

    http_access allow manager localhost
    http_access deny manager
    #http_access allow purge localhost
    #http_access deny purge
    http_access deny !Safe_ports
    http_access deny CONNECT !SSL_ports

    #### Regra de acesso local ####

    acl redelan src 172.20.90.0/24
    http_access allow localhost
    http_access allow redelan

    http_access deny all

    ### tentei acessar de uma maquina sem proxy setado e vi esses erros aqui no access.log ###
    1727985974.998 0 172.20.90.50 NONE_NONE/400 3582 - error:invalid-request - HIER_NONE/- text/html
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  • Quote

    • 10. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Flávio Ricardo
    maoflaric
    (usa CentOS)

    Enviado em 03/10/2024 - 17:15h


    maoflaric escreveu:

    Fiz umas mudanças.

    e ficou assim


    ### Script iptables ###


    #!/bin/bash
    # chkconfig: 2345 25 98

    # SCRIPT DE FIREWALL COM GATEWAY NA REDE!

    # DECLARANDO VARIAVEIS
    IF_LOCAL="enp1s0" # interface local network
    INTERNET="enp4s0f0" # external interface
    LOCAL_NETWORK="172.20.90.0/24"
    LOOPBACK="lo" # loopback interface

    IPTABLES="/sbin/iptables" # Daemon of firewall

    begin(){

    # LIMPA (FLUSH) TODAS AS REGRAS DA TABELA DE FILTRAGEM
    $IPTABLES -F
    $IPTABLES -F INPUT
    $IPTABLES -F OUTPUT
    $IPTABLES -F FORWARD
    $IPTABLES -F -t mangle
    $IPTABLES -t mangle -X
    $IPTABLES -F -t nat
    $IPTABLES -X

    # POLICIES DEFAULT
    $IPTABLES -P INPUT DROP
    $IPTABLES -P OUTPUT ACCEPT
    $IPTABLES -P FORWARD DROP

    # COMPARTILHANDO CONEXÃO
    modprobe iptable_nat
    echo 1 > /proc/sys/net/ipv4/ip_forward

    # INICIO DE REGRAS APLICADAS COM DESTINO AO FIREWALL
    $IPTABLES -A INPUT -i $LOOPBACK -j ACCEPT
    $IPTABLES -A INPUT -i $INTERNET -p tcp --dport 2200 -j ACCEPT
    $IPTABLES -A INPUT -i $IF_LOCAL -p tcp --dport 2200 -j ACCEPT
    $IPTABLES -A INPUT -i $IF_LOCAL -p tcp --dport 3128 -s $LOCAL_NETWORK -d 172.20.90.1 -j ACCEPT
    $IPTABLES -A INPUT -i $INTERNET -p udp --dport 53 -j ACCEPT
    $IPTABLES -A INPUT -i $INTERNET -p udp --dport 161 -j ACCEPT
    $IPTABLES -A INPUT -i $INTERNET -p icmp -j ACCEPT

    # TERMINO DE REGRAS APLICADAS COM DESTINO AO FIREWALL

    # INICIO DE REGRAS PARA REDE LOCAL
    $IPTABLES -A FORWARD -i $IF_LOCAL -p udp --dport 53 -s $LOCAL_NETWORK -j ACCEPT
    $IPTABLES -A FORWARD -i $IF_LOCAL -p icmp -j ACCEPT

    # RULES FOR SNAT
    $IPTABLES -t nat -A POSTROUTING -o $INTERNET -s $LOCAL_NETWORK -j SNAT --to-source 172.19.4.234

    $IPTABLES -A FORWARD -p tcp -m tcp -m multiport --dports 53,389,636,135,139,445,110,995,25,465,587 -j ACCEPT
    $IPTABLES -A FORWARD -p udp -m udp -m multiport --dports 53,389,636 -j ACCEPT

    # TERMINO REGRAS PARA REDE LOCAL

    # ESTABILIZANDO CONEXÕES
    $IPTABLES -I INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
    $IPTABLES -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT

    # REGRAS PARA O PROXY SQUID TRANSPARENTE
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 80 -j REDIRECT --to-port 3128
    $IPTABLES -t nat -A PREROUTING -i $IF_LOCAL -p tcp --dport 443 -j REDIRECT --to-port 3128

    echo "INICIANDO O FIREWALL..."
    }

    stop(){
    $IPTABLES -F
    $IPTABLES -F -t nat
    $IPTABLES -t mangle -F
    $IPTABLES -P INPUT ACCEPT
    $IPTABLES -P FORWARD ACCEPT
    $IPTABLES -P OUTPUT ACCEPT
    $IPTABLES -X
    echo "FIREWALL PARADO, REDE DESPROTEGIDA"
    }

    case "$1" in
    "start") begin ;;
    "stop") stop ;;
    "restart") stop; begin ;;
    *) echo "Use os parametros start ou stop"
    esac

    ### squid.conf ###

    #### Cabeçalho ####
    # Squid Cache: Version 5.5 #

    # Alterar a porta para escutar no tráfego transparente (apenas uma porta)
    http_port 172.20.90.1:3128 intercept
    http_port 127.0.0.1:3128

    visible_hostname fw

    dns_nameservers 192.166.254.60 192.166.254.70

    cache_mem 2048 MB
    maximum_object_size_in_memory 512 MB
    maximum_object_size 512 MB
    minimum_object_size 0 MB
    cache_swap_high 95
    cache_swap_low 90
    httpd_suppress_version_string on

    cache_dir ufs /var/spool/squid 2048 16 256
    error_directory /usr/share/squid/errors/pt-br
    cache_log /var/log/squid/cache.log
    access_log /var/log/squid/access.log

    refresh_pattern ^ftp: 15 20% 2280
    refresh_pattern ^gopher: 15 20% 2280
    refresh_pattern . 15 20% 2280

    #### Regras ACLs de bloqueio de sites ####

    acl SitesPermitidos url_regex -i "/etc/squid/SitesPermitidos"
    http_access allow SitesPermitidos

    acl SitesBloqueados url_regex -i "/etc/squid/SitesBloqueados"
    http_access deny SitesBloqueados

    acl SitesImproprios url_regex -i "/etc/squid/SitesImproprios"
    http_access deny SitesImproprios

    #### ACLs Portas ####

    acl SSL_ports port 443 # https
    acl SSL_ports port 444 # https
    acl SSL_ports port 3001 # https
    acl SSL_ports port 3002 # https
    acl SSL_ports port 3003 # https
    acl SSL_ports port 563 # snews
    acl SSL_ports port 873 # rsync
    acl SSL_ports port 8059 #
    acl SSL_ports port 8050 #
    acl SSL_ports port 8058 #
    acl SSL_ports port 8061 # Sistema Ponto
    acl SSL_ports port 2021 # Sistema Ponto
    acl SSL_ports port 2022 # Sistema Ponto
    acl SSL_ports port 3000 # Sistema Ponto
    acl Safe_ports port 80 # http
    acl Safe_ports port 83 # http
    acl Safe_ports port 21 # ftp
    acl Safe_ports port 443 # https
    acl Safe_ports port 444 # https
    acl Safe_ports port 70 # gopher
    acl Safe_ports port 210 # wais
    acl Safe_ports port 1025-65535 # unregistered ports
    acl Safe_ports port 280 # http-mgmt
    acl Safe_ports port 488 # gss-http
    acl Safe_ports port 591 # filemaker
    acl Safe_ports port 777 # multiling http
    acl Safe_ports port 631 # cups
    acl Safe_ports port 873 # rsync
    acl Safe_ports port 901 # SWAT
    acl Safe_ports port 8050 # Sistema Ponto
    acl Safe_ports port 8058 # Sistema Ponto
    acl Safe_ports port 8059 # Sistema Ponto
    acl Safe_ports port 8061 # Sistema Ponto
    acl Safe_ports port 2021 # Sistema Ponto
    acl Safe_ports port 2022 # Sistema Ponto
    acl Safe_ports port 3000 # Sistema Ponto
    acl Safe_ports port 3001 # Sistema Ponto
    acl porge method PURGE
    acl CONNECT method CONNECT

    http_access allow manager localhost
    http_access deny manager
    #http_access allow purge localhost
    #http_access deny purge
    http_access deny !Safe_ports
    http_access deny CONNECT !SSL_ports

    #### Regra de acesso local ####

    acl redelan src 172.20.90.0/24
    http_access allow localhost
    http_access allow redelan

    http_access deny all

    ### tentei acessar de uma maquina sem proxy setado e vi esses erros aqui no access.log ###
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    0 0
  • Quote

    • 11. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Buckminster
    Buckminster
    (usa Debian)

    Enviado em 03/10/2024 - 21:58h

    172.20.90.50 NONE_NONE/400 3582 - error:invalid-request - HIER_NONE/- text/html

    O IP 172.20.90.50 fez uma requisição inválida, resultando em um código de status HTTP 400 (Bad Request). O erro "invalid-request" geralmente significa que a requisição que o cliente (o IP 172.20.90.50) fez não estava formatada corretamente ou não estava de acordo com o que o Squid ou o protocolo HTTP esperavam.
    Pode significar também que o protocolo/porta/servidor específico ou URL está sendo bloqueado. Isso significa que provavelmente portas SSL estão negadas ou tem portas SSL não padrão, etc.
    Essa porta aqui
    acl Safe_ports port 444 # https
    Você está usando para quê?

    Faça mais um teste.
    Comente a linha
    dns_nameservers 192.166.254.60 192.166.254.70
    Reinicie e acesse dessa mesma máquina sem o proxy setado e veja se esses erros continuam aparecendo no access.log.

    E depois comente a linha
    http_access deny CONNECT !SSL_ports
    Reinicie e acesse dessa mesma máquina sem o proxy setado e veja se esses erros continuam aparecendo no access.log.

    Faça um ping desse IP 172.20.90.50 para a máquina do proxy e veja se o proxy responde.
    E execute dig ou nslookup para os DNSs a fim de garantir que os nomes de domínio estão sendo resolvidos corretamente.

    Não vi erro nenhum nas configurações do Squid e do Iptables, aparentemente estão corretas.

    Verifique as configurações das placas de rede também.
    Veja que de um script para o outro você mudou as interfaces:
    IF_LOCAL="enp3s0" # interface local network
    INTERNET="enp2s0" # external interface

    IF_LOCAL="enp1s0" # interface local network
    INTERNET="enp4s0f0" # external interface


    _________________________________________________________
    Always listen the Buck!
    Enquanto o cursor estiver pulsando, há vida!

    0 0
  • Quote

    • 12. Re: Proxy Squid Version 5.5 + Alma Linux 9.4

    Flávio Ricardo
    maoflaric
    (usa CentOS)

    Enviado em 10/10/2024 - 10:13h


    Buckminster escreveu:

    172.20.90.50 NONE_NONE/400 3582 - error:invalid-request - HIER_NONE/- text/html

    O IP 172.20.90.50 fez uma requisição inválida, resultando em um código de status HTTP 400 (Bad Request). O erro "invalid-request" geralmente significa que a requisição que o cliente (o IP 172.20.90.50) fez não estava formatada corretamente ou não estava de acordo com o que o Squid ou o protocolo HTTP esperavam.
    Pode significar também que o protocolo/porta/servidor específico ou URL está sendo bloqueado. Isso significa que provavelmente portas SSL estão negadas ou tem portas SSL não padrão, etc.
    Essa porta aqui
    acl Safe_ports port 444 # https
    Você está usando para quê?

    Faça mais um teste.
    Comente a linha
    dns_nameservers 192.166.254.60 192.166.254.70
    Reinicie e acesse dessa mesma máquina sem o proxy setado e veja se esses erros continuam aparecendo no access.log.

    E depois comente a linha
    http_access deny CONNECT !SSL_ports
    Reinicie e acesse dessa mesma máquina sem o proxy setado e veja se esses erros continuam aparecendo no access.log.

    Faça um ping desse IP 172.20.90.50 para a máquina do proxy e veja se o proxy responde.
    E execute dig ou nslookup para os DNSs a fim de garantir que os nomes de domínio estão sendo resolvidos corretamente.

    Não vi erro nenhum nas configurações do Squid e do Iptables, aparentemente estão corretas.

    Verifique as configurações das placas de rede também.
    Veja que de um script para o outro você mudou as interfaces:
    IF_LOCAL="enp3s0" # interface local network
    INTERNET="enp2s0" # external interface

    IF_LOCAL="enp1s0" # interface local network
    INTERNET="enp4s0f0" # external interface


    _________________________________________________________
    Always listen the Buck!
    Enquanto o cursor estiver pulsando, há vida!







    Bom dia amigo Buckminster, Rapaz não vai de jeito nenhum, Não sei se é a distro que estou usando Oracle Linux 9.4, para mim melhor para serviços de FW Iptables entre outros. Vejo muitos howto proxysquid transparent antigo até, o mais novo é de 2019, mas utilizando distro Debian ou Ubuntu server. Te pergunto, Teria uma oportunidade da gente fazer uma vídeo conferencia pra gente montar esse proxysquid transparent no SO Oracle Linux 9 e ai sim funcionando poderíamos divulgar aqui para os que estão no mesmo cenário que eu :-) ? Caso a resposta seja sim, eu monto o cenário que estou no momento e marcamos para vermos juntos. de qualquer modo, desde já agradeço todo o seu tempo.

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