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VPN com FreeS/WAN

O FreeS/WAN é uma das várias implementações do IPSec (Internet Protocol Security) e IKE (Internet Key Exchange) para GNU/Linux. Com ele você pode fazer uma VPN entre redes fisicamente distantes usando uma rede insegura como a internet.
Pedro Pereira pogo

Por Pedro Pereira em 10/05/2005

Hits: 89.269 Categoria: Linux Subcategoria: Segurança
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Introdução

O FreeS/WAN é uma das várias implementações do IPSec (Internet Protocol Security) e IKE (Internet Key Exchange) para GNU/Linux.

Utilizando estes dois serviços, você pode fazer um túnel seguro entre duas redes distantes com seus dados passando por redes inseguras (como a Internet). O IPSec consegue fazer com que os dados trafeguem de modo seguro através de uma rede insegura, pois tudo o que passará por este túnel é criptografado pelo gateway com IPSec instalado e só é descriptografado na outra ponta. No gateway que conhece a chave para realizar a descriptografia. Assim, você consegue estabelecer uma VPN (Virtual Private Network) entre vários locais diferentes, utilizando a Internet, de forma bastante segura.

Para descrever como estabelecer um túnel VPN criptografado, neste documento vou me basear na versão 2.06 do FreeS/WAN.

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Páginas do artigo

   1. Introdução
   2. Instalação
   3. Gerando as chaves RSA - utilizando o arquivo ipsec.secrets
   4. Configurando o serviço IPSec - utilizando o arquivo ipsec.conf
   5. Testando os túneis
   6. Troubleshooting - corrigindo os inevitáveis erros
   7. Fontes e conclusão

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Comentários

#1 Comentário enviado por y2h4ck em 10/05/2005 - 09:55h
Ola tudo bem ?
Bom so pra fechar queria dar uma dica, ao inves de fazer com FreeSWAN, utilizem o OpenSWAN pois ele e a continuacao do projeto FreeSWAN que se acabou fazem 2 anos +/-.

ABracos
#2 Comentário enviado por peregrino em 10/05/2005 - 10:39h
opa blz

fala spaw tudo bem e concerteza openswan é bem melhor por ter suporte mas ta otimo esse tutorial

cara gostaria de saber como eu gero chaves dinamicas com essa vpn ou em openswan

obrigado
#3 Comentário enviado por Bique em 10/05/2005 - 12:29h
Simplismente Beleza...Keep Going na minha lingua de Mocambique KANIMAMBO.
#4 Comentário enviado por crayon em 10/05/2005 - 23:15h
O artigo está muito bom, mas a dica do peregrino deve ser seguida, uma vez que o FreeS/WAN acabou, infelizmente.
O Openswan está bem documentado e não tive problemas em sua utilização.

Atc,
Kassiano
#5 Comentário enviado por ferjun01 em 30/08/2008 - 11:13h
Salve galera, peço ajuda para resolver este problema..

Estou com problemas para fechar uma vpn com Freeswan no Slackware, esta configuração já existia e alterei apenas os ip's, a chave PSK e inclui o 3-DES, quando subo a vpn aparentemente está fechada, mas quando mando um telnet para o destino ele vai por fora da vpn, abaixo vou colocar os arquivos de configuraçâo, se possível peço sua ajuda neste caso, muito obrigado :

IPSEC.CONF

# /etc/ipsec.conf - FreeS/WAN IPsec configuration file
# RCSID $Id: ipsec.conf.in,v 1.11 2003/06/13 23:28:41 sam Exp $

# This file: /usr/local/share/doc/freeswan/ipsec.conf-sample
#
# Manual: ipsec.conf.5
#
# Help:
# http://www.strongsec.com/freeswan/install.htm

version 2.0 # conforms to second version of ipsec.conf specification

# basic configuration
config setup
interfaces="ipsec0=eth0"
klipsdebug=none
plutodebug=none
# plutoload=%search
# plutostart=%search
# plutowait=no

# Debug-logging controls: "none" for (almost) none, "all" for lots.
# klipsdebug=all
# plutodebug=all
# crlcheckinterval=600
# strictcrlpolicy=yes

conn %default
auto=add
type=tunnel
left=
right=
authby=secret
keyexchange=ike
esp=3des-md5-96i
keylife=24h

# OE policy groups are disabled by default
conn block
auto=ignore

conn clear
auto=ignore

conn private
auto=ignore

conn private-or-clear
auto=ignore

conn clear-or-private
auto=ignore

conn packetdefault
auto=ignore

# Add connections here.

# sample VPN connection
#sample# conn sample
#sample# # Left security gateway, subnet behind it, next hop toward right.
#sample# left=%defaultroute
#sample# leftcert=myCert.pem
#sample# leftsubnet=172.16.0.0/24
#sample# # Right security gateway, subnet behind it, next hop toward left.
#sample# right=10.12.12.1
#sample# rightid="<Distinguished name of right security gateway>"
#sample# rightsubnet=192.168.0.0/24
#sample# # To authorize this connection, but not actually start it, at startup,
#sample# # uncomment this.
#sample# #auto=start
conn vpn
auto=add
type=tunnel
left=200.X.X.11
leftsubnet=200.X.X.51/32
leftnexthop=
right=201.X.X.2
rightsubnet=192.168.1.0/24
rightnexthop=201.X.X.1
authby=secret
esp=3des-md5-96i
keylife=24h
pfs=yes
rekeymargin=9m
rekeyfuzz=25%

No ipsec.secret, tem apenas uma linha contendo a chave, substitui uma pela outra :

ipsec.secret

:PSK "CHAVE"


Dando um ipsec auto --status :
ipsec auto --status
000 interface ipsec0/eth0 201.X.X.2
000 %myid = (none)
000 debug none
000
000 "vpn": 192.168.1.0/24===201.X.X.2---201.X.X.1...200.X.X.11===200.X.X.51/32; erouted; eroute owner: #4
000 "vpn": ike_life: 3600s; ipsec_life: 86400s; rekey_margin: 540s; rekey_fuzz: 25%; keyingtries: 0
000 "vpn": policy: PSK+ENCRYPT+TUNNEL+PFS+UP; prio: 32,24; interface: eth0;
000 "vpn": newest ISAKMP SA: #3; newest IPsec SA: #4;
000
000 #4: "vpn" STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 85714s; newest IPSEC; eroute owner
000 #4: "vpn" esp.243f75c5@200.X.X.11 esp.bbaf1782@201.X.X.2 tun.1004@200.X.X.11 tun.1003@201.X.X.2
000 #3: "vpn" STATE_MAIN_I4 (ISAKMP SA established); EVENT_SA_REPLACE in 3042s; newest ISAKMP
000


No var/log/secure apresenta um erro na 1ª linha do ipsec.secrets :
/var/log/secure
6378 Aug 28 22:27:13 servervpn pluto[15662]: Starting Pluto (FreeS/WAN Version 2.05 X.509-1.5.3 PLUTO_ USES_KEYRR)
6379 Aug 28 22:27:13 servervpn pluto[15662]: Using KLIPS IPsec interface code
6383 Aug 28 22:27:13 servervpn pluto[15662]: Changing to directory '/etc/ipsec.d/crls'
6384 Aug 28 22:27:13 servervpn pluto[15662]: added connection description "vpn"
6385 Aug 28 22:27:13 servervpn pluto[15662]: listening for IKE messages
6386 Aug 28 22:27:13 servervpn pluto[15662]: adding interface ipsec0/eth0 201.X.X.2
6387 Aug 28 22:27:13 servervpn pluto[15662]: loading secrets from "/etc/ipsec.secrets"
6388 Aug 28 22:27:13 servervpn pluto[15662]: ERROR "/etc/ipsec.secrets" line 1: index ":PSK" illegal l eading `:' in IPv6 numeric address
6389 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: initiating Main Mode
6390 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: received Vendor ID Payload; ASCII hash: tmSalve galera, peço ajuda para resolver este problema..

Estou com problemas para fechar uma vpn com Freeswan no Slackware, esta configuração já existia e alterei apenas os ip's, a chave PSK e inclui o 3-DES, quando subo a vpn aparentemente está fechada, mas quando mando um telnet para o destino ele vai por fora da vpn, abaixo vou colocar os arquivos de configuraçâo, se possível peço sua ajuda neste caso, muito obrigado :

IPSEC.CONF

# /etc/ipsec.conf - FreeS/WAN IPsec configuration file
# RCSID $Id: ipsec.conf.in,v 1.11 2003/06/13 23:28:41 sam Exp $

# This file: /usr/local/share/doc/freeswan/ipsec.conf-sample
#
# Manual: ipsec.conf.5
#
# Help:
# http://www.strongsec.com/freeswan/install.htm

version 2.0 # conforms to second version of ipsec.conf specification

# basic configuration
config setup
interfaces="ipsec0=eth0"
klipsdebug=none
plutodebug=none
# plutoload=%search
# plutostart=%search
# plutowait=no

# Debug-logging controls: "none" for (almost) none, "all" for lots.
# klipsdebug=all
# plutodebug=all
# crlcheckinterval=600
# strictcrlpolicy=yes

conn %default
auto=add
type=tunnel
left=
right=
authby=secret
keyexchange=ike
esp=3des-md5-96i
keylife=24h

# OE policy groups are disabled by default
conn block
auto=ignore

conn clear
auto=ignore

conn private
auto=ignore

conn private-or-clear
auto=ignore

conn clear-or-private
auto=ignore

conn packetdefault
auto=ignore

# Add connections here.

# sample VPN connection
#sample# conn sample
#sample# # Left security gateway, subnet behind it, next hop toward right.
#sample# left=%defaultroute
#sample# leftcert=myCert.pem
#sample# leftsubnet=172.16.0.0/24
#sample# # Right security gateway, subnet behind it, next hop toward left.
#sample# right=10.12.12.1
#sample# rightid="<Distinguished name of right security gateway>"
#sample# rightsubnet=192.168.0.0/24
#sample# # To authorize this connection, but not actually start it, at startup,
#sample# # uncomment this.
#sample# #auto=start
conn vpn
auto=add
type=tunnel
left=200.X.X.11
leftsubnet=200.X.X.51/32
leftnexthop=
right=201.X.X.2
rightsubnet=192.168.1.0/24
rightnexthop=201.X.X.1
authby=secret
esp=3des-md5-96i
keylife=24h
pfs=yes
rekeymargin=9m
rekeyfuzz=25%

No ipsec.secret, tem apenas uma linha contendo a chave, substitui uma pela outra :

ipsec.secret

:PSK "CHAVE"


Dando um ipsec auto --status :
ipsec auto --status
000 interface ipsec0/eth0 201.X.X.2
000 %myid = (none)
000 debug none
000
000 "vpn": 192.168.1.0/24===201.X.X.2---201.X.X.1...200.X.X.11===200.X.X.51/32; erouted; eroute owner: #4
000 "vpn": ike_life: 3600s; ipsec_life: 86400s; rekey_margin: 540s; rekey_fuzz: 25%; keyingtries: 0
000 "vpn": policy: PSK+ENCRYPT+TUNNEL+PFS+UP; prio: 32,24; interface: eth0;
000 "vpn": newest ISAKMP SA: #3; newest IPsec SA: #4;
000
000 #4: "vpn" STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 85714s; newest IPSEC; eroute owner
000 #4: "vpn" esp.243f75c5@200.X.X.11 esp.bbaf1782@201.X.X.2 tun.1004@200.X.X.11 tun.1003@201.X.X.2
000 #3: "vpn" STATE_MAIN_I4 (ISAKMP SA established); EVENT_SA_REPLACE in 3042s; newest ISAKMP
000


No var/log/secure apresenta um erro na 1ª linha do ipsec.secrets :
/var/log/secure
6378 Aug 28 22:27:13 servervpn pluto[15662]: Starting Pluto (FreeS/WAN Version 2.05 X.509-1.5.3 PLUTO_ USES_KEYRR)
6379 Aug 28 22:27:13 servervpn pluto[15662]: Using KLIPS IPsec interface code
6383 Aug 28 22:27:13 servervpn pluto[15662]: Changing to directory '/etc/ipsec.d/crls'
6384 Aug 28 22:27:13 servervpn pluto[15662]: added connection description "vpn"
6385 Aug 28 22:27:13 servervpn pluto[15662]: listening for IKE messages
6386 Aug 28 22:27:13 servervpn pluto[15662]: adding interface ipsec0/eth0 201.X.X.2
6387 Aug 28 22:27:13 servervpn pluto[15662]: loading secrets from "/etc/ipsec.secrets"
6388 Aug 28 22:27:13 servervpn pluto[15662]: ERROR "/etc/ipsec.secrets" line 1: index ":PSK" illegal l eading `:' in IPv6 numeric address
6389 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: initiating Main Mode
6390 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: received Vendor ID Payload; ASCII hash: tm{COMENTARIO}31` A{COMENTARIO}24kQo*,{COMENTARIO}16c}/({COMENTARIO}0748{COMENTARIO}37
6391 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: Peer ID is ID_IPV4_ADDR: '200.X.X.11'
6392 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: ISAKMP SA established
6393 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: initiating Quick Mode PSK+ENCRYPT+TUNNEL+PFS+UP {using isakmp#1}
6394 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: ignoring informational payload, type IPSEC_RESP ONDER_LIFETIME
6395 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: sent QI2, IPsec SA established {ESP=>0xd6e0a488 <0x92ec5888}
6396 Aug 28 22:28:11 servervpn pluto[15662]: shutting down
6397 Aug 28 22:28:11 servervpn pluto[15662]: forgetting secrets
6398 Aug 28 22:28:11 servervpn pluto[15662]: "vpn": deleting connection
6399 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #2: deleting state (STATE_QUICK_I2)
6400 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #1: deleting state (STATE_MAIN_I4)
6401 Aug 28 22:28:11 servervpn pluto[15662]: shutting down interface ipsec0/eth0 201.X.X.231` ASalve galera, peço ajuda para resolver este problema..

Estou com problemas para fechar uma vpn com Freeswan no Slackware, esta configuração já existia e alterei apenas os ip's, a chave PSK e inclui o 3-DES, quando subo a vpn aparentemente está fechada, mas quando mando um telnet para o destino ele vai por fora da vpn, abaixo vou colocar os arquivos de configuraçâo, se possível peço sua ajuda neste caso, muito obrigado :

IPSEC.CONF

# /etc/ipsec.conf - FreeS/WAN IPsec configuration file
# RCSID $Id: ipsec.conf.in,v 1.11 2003/06/13 23:28:41 sam Exp $

# This file: /usr/local/share/doc/freeswan/ipsec.conf-sample
#
# Manual: ipsec.conf.5
#
# Help:
# http://www.strongsec.com/freeswan/install.htm

version 2.0 # conforms to second version of ipsec.conf specification

# basic configuration
config setup
interfaces="ipsec0=eth0"
klipsdebug=none
plutodebug=none
# plutoload=%search
# plutostart=%search
# plutowait=no

# Debug-logging controls: "none" for (almost) none, "all" for lots.
# klipsdebug=all
# plutodebug=all
# crlcheckinterval=600
# strictcrlpolicy=yes

conn %default
auto=add
type=tunnel
left=
right=
authby=secret
keyexchange=ike
esp=3des-md5-96i
keylife=24h

# OE policy groups are disabled by default
conn block
auto=ignore

conn clear
auto=ignore

conn private
auto=ignore

conn private-or-clear
auto=ignore

conn clear-or-private
auto=ignore

conn packetdefault
auto=ignore

# Add connections here.

# sample VPN connection
#sample# conn sample
#sample# # Left security gateway, subnet behind it, next hop toward right.
#sample# left=%defaultroute
#sample# leftcert=myCert.pem
#sample# leftsubnet=172.16.0.0/24
#sample# # Right security gateway, subnet behind it, next hop toward left.
#sample# right=10.12.12.1
#sample# rightid="<Distinguished name of right security gateway>"
#sample# rightsubnet=192.168.0.0/24
#sample# # To authorize this connection, but not actually start it, at startup,
#sample# # uncomment this.
#sample# #auto=start
conn vpn
auto=add
type=tunnel
left=200.X.X.11
leftsubnet=200.X.X.51/32
leftnexthop=
right=201.X.X.2
rightsubnet=192.168.1.0/24
rightnexthop=201.X.X.1
authby=secret
esp=3des-md5-96i
keylife=24h
pfs=yes
rekeymargin=9m
rekeyfuzz=25%

No ipsec.secret, tem apenas uma linha contendo a chave, substitui uma pela outra :

ipsec.secret

:PSK "CHAVE"


Dando um ipsec auto --status :
ipsec auto --status
000 interface ipsec0/eth0 201.X.X.2
000 %myid = (none)
000 debug none
000
000 "vpn": 192.168.1.0/24===201.X.X.2---201.X.X.1...200.X.X.11===200.X.X.51/32; erouted; eroute owner: #4
000 "vpn": ike_life: 3600s; ipsec_life: 86400s; rekey_margin: 540s; rekey_fuzz: 25%; keyingtries: 0
000 "vpn": policy: PSK+ENCRYPT+TUNNEL+PFS+UP; prio: 32,24; interface: eth0;
000 "vpn": newest ISAKMP SA: #3; newest IPsec SA: #4;
000
000 #4: "vpn" STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 85714s; newest IPSEC; eroute owner
000 #4: "vpn" esp.243f75c5@200.X.X.11 esp.bbaf1782@201.X.X.2 tun.1004@200.X.X.11 tun.1003@201.X.X.2
000 #3: "vpn" STATE_MAIN_I4 (ISAKMP SA established); EVENT_SA_REPLACE in 3042s; newest ISAKMP
000


No var/log/secure apresenta um erro na 1ª linha do ipsec.secrets :
/var/log/secure
6378 Aug 28 22:27:13 servervpn pluto[15662]: Starting Pluto (FreeS/WAN Version 2.05 X.509-1.5.3 PLUTO_ USES_KEYRR)
6379 Aug 28 22:27:13 servervpn pluto[15662]: Using KLIPS IPsec interface code
6383 Aug 28 22:27:13 servervpn pluto[15662]: Changing to directory '/etc/ipsec.d/crls'
6384 Aug 28 22:27:13 servervpn pluto[15662]: added connection description "vpn"
6385 Aug 28 22:27:13 servervpn pluto[15662]: listening for IKE messages
6386 Aug 28 22:27:13 servervpn pluto[15662]: adding interface ipsec0/eth0 201.X.X.2
6387 Aug 28 22:27:13 servervpn pluto[15662]: loading secrets from "/etc/ipsec.secrets"
6388 Aug 28 22:27:13 servervpn pluto[15662]: ERROR "/etc/ipsec.secrets" line 1: index ":PSK" illegal l eading `:' in IPv6 numeric address
6389 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: initiating Main Mode
6390 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: received Vendor ID Payload; ASCII hash: tm{COMENTARIO}31` A{COMENTARIO}24kQo*,{COMENTARIO}16c}/({COMENTARIO}0748{COMENTARIO}37
6391 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: Peer ID is ID_IPV4_ADDR: '200.X.X.11'
6392 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: ISAKMP SA established
6393 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: initiating Quick Mode PSK+ENCRYPT+TUNNEL+PFS+UP {using isakmp#1}
6394 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: ignoring informational payload, type IPSEC_RESP ONDER_LIFETIME
6395 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: sent QI2, IPsec SA established {ESP=>0xd6e0a488 <0x92ec5888}
6396 Aug 28 22:28:11 servervpn pluto[15662]: shutting down
6397 Aug 28 22:28:11 servervpn pluto[15662]: forgetting secrets
6398 Aug 28 22:28:11 servervpn pluto[15662]: "vpn": deleting connection
6399 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #2: deleting state (STATE_QUICK_I2)
6400 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #1: deleting state (STATE_MAIN_I4)
6401 Aug 28 22:28:11 servervpn pluto[15662]: shutting down interface ipsec0/eth0 201.X.X.224kQo*,Salve galera, peço ajuda para resolver este problema..

Estou com problemas para fechar uma vpn com Freeswan no Slackware, esta configuração já existia e alterei apenas os ip's, a chave PSK e inclui o 3-DES, quando subo a vpn aparentemente está fechada, mas quando mando um telnet para o destino ele vai por fora da vpn, abaixo vou colocar os arquivos de configuraçâo, se possível peço sua ajuda neste caso, muito obrigado :

IPSEC.CONF

# /etc/ipsec.conf - FreeS/WAN IPsec configuration file
# RCSID $Id: ipsec.conf.in,v 1.11 2003/06/13 23:28:41 sam Exp $

# This file: /usr/local/share/doc/freeswan/ipsec.conf-sample
#
# Manual: ipsec.conf.5
#
# Help:
# http://www.strongsec.com/freeswan/install.htm

version 2.0 # conforms to second version of ipsec.conf specification

# basic configuration
config setup
interfaces="ipsec0=eth0"
klipsdebug=none
plutodebug=none
# plutoload=%search
# plutostart=%search
# plutowait=no

# Debug-logging controls: "none" for (almost) none, "all" for lots.
# klipsdebug=all
# plutodebug=all
# crlcheckinterval=600
# strictcrlpolicy=yes

conn %default
auto=add
type=tunnel
left=
right=
authby=secret
keyexchange=ike
esp=3des-md5-96i
keylife=24h

# OE policy groups are disabled by default
conn block
auto=ignore

conn clear
auto=ignore

conn private
auto=ignore

conn private-or-clear
auto=ignore

conn clear-or-private
auto=ignore

conn packetdefault
auto=ignore

# Add connections here.

# sample VPN connection
#sample# conn sample
#sample# # Left security gateway, subnet behind it, next hop toward right.
#sample# left=%defaultroute
#sample# leftcert=myCert.pem
#sample# leftsubnet=172.16.0.0/24
#sample# # Right security gateway, subnet behind it, next hop toward left.
#sample# right=10.12.12.1
#sample# rightid="<Distinguished name of right security gateway>"
#sample# rightsubnet=192.168.0.0/24
#sample# # To authorize this connection, but not actually start it, at startup,
#sample# # uncomment this.
#sample# #auto=start
conn vpn
auto=add
type=tunnel
left=200.X.X.11
leftsubnet=200.X.X.51/32
leftnexthop=
right=201.X.X.2
rightsubnet=192.168.1.0/24
rightnexthop=201.X.X.1
authby=secret
esp=3des-md5-96i
keylife=24h
pfs=yes
rekeymargin=9m
rekeyfuzz=25%

No ipsec.secret, tem apenas uma linha contendo a chave, substitui uma pela outra :

ipsec.secret

:PSK "CHAVE"


Dando um ipsec auto --status :
ipsec auto --status
000 interface ipsec0/eth0 201.X.X.2
000 %myid = (none)
000 debug none
000
000 "vpn": 192.168.1.0/24===201.X.X.2---201.X.X.1...200.X.X.11===200.X.X.51/32; erouted; eroute owner: #4
000 "vpn": ike_life: 3600s; ipsec_life: 86400s; rekey_margin: 540s; rekey_fuzz: 25%; keyingtries: 0
000 "vpn": policy: PSK+ENCRYPT+TUNNEL+PFS+UP; prio: 32,24; interface: eth0;
000 "vpn": newest ISAKMP SA: #3; newest IPsec SA: #4;
000
000 #4: "vpn" STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 85714s; newest IPSEC; eroute owner
000 #4: "vpn" esp.243f75c5@200.X.X.11 esp.bbaf1782@201.X.X.2 tun.1004@200.X.X.11 tun.1003@201.X.X.2
000 #3: "vpn" STATE_MAIN_I4 (ISAKMP SA established); EVENT_SA_REPLACE in 3042s; newest ISAKMP
000


No var/log/secure apresenta um erro na 1ª linha do ipsec.secrets :
/var/log/secure
6378 Aug 28 22:27:13 servervpn pluto[15662]: Starting Pluto (FreeS/WAN Version 2.05 X.509-1.5.3 PLUTO_ USES_KEYRR)
6379 Aug 28 22:27:13 servervpn pluto[15662]: Using KLIPS IPsec interface code
6383 Aug 28 22:27:13 servervpn pluto[15662]: Changing to directory '/etc/ipsec.d/crls'
6384 Aug 28 22:27:13 servervpn pluto[15662]: added connection description "vpn"
6385 Aug 28 22:27:13 servervpn pluto[15662]: listening for IKE messages
6386 Aug 28 22:27:13 servervpn pluto[15662]: adding interface ipsec0/eth0 201.X.X.2
6387 Aug 28 22:27:13 servervpn pluto[15662]: loading secrets from "/etc/ipsec.secrets"
6388 Aug 28 22:27:13 servervpn pluto[15662]: ERROR "/etc/ipsec.secrets" line 1: index ":PSK" illegal l eading `:' in IPv6 numeric address
6389 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: initiating Main Mode
6390 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: received Vendor ID Payload; ASCII hash: tm{COMENTARIO}31` A{COMENTARIO}24kQo*,{COMENTARIO}16c}/({COMENTARIO}0748{COMENTARIO}37
6391 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: Peer ID is ID_IPV4_ADDR: '200.X.X.11'
6392 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: ISAKMP SA established
6393 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: initiating Quick Mode PSK+ENCRYPT+TUNNEL+PFS+UP {using isakmp#1}
6394 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: ignoring informational payload, type IPSEC_RESP ONDER_LIFETIME
6395 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: sent QI2, IPsec SA established {ESP=>0xd6e0a488 <0x92ec5888}
6396 Aug 28 22:28:11 servervpn pluto[15662]: shutting down
6397 Aug 28 22:28:11 servervpn pluto[15662]: forgetting secrets
6398 Aug 28 22:28:11 servervpn pluto[15662]: "vpn": deleting connection
6399 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #2: deleting state (STATE_QUICK_I2)
6400 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #1: deleting state (STATE_MAIN_I4)
6401 Aug 28 22:28:11 servervpn pluto[15662]: shutting down interface ipsec0/eth0 201.X.X.216c}/(Salve galera, peço ajuda para resolver este problema..

Estou com problemas para fechar uma vpn com Freeswan no Slackware, esta configuração já existia e alterei apenas os ip's, a chave PSK e inclui o 3-DES, quando subo a vpn aparentemente está fechada, mas quando mando um telnet para o destino ele vai por fora da vpn, abaixo vou colocar os arquivos de configuraçâo, se possível peço sua ajuda neste caso, muito obrigado :

IPSEC.CONF

# /etc/ipsec.conf - FreeS/WAN IPsec configuration file
# RCSID $Id: ipsec.conf.in,v 1.11 2003/06/13 23:28:41 sam Exp $

# This file: /usr/local/share/doc/freeswan/ipsec.conf-sample
#
# Manual: ipsec.conf.5
#
# Help:
# http://www.strongsec.com/freeswan/install.htm

version 2.0 # conforms to second version of ipsec.conf specification

# basic configuration
config setup
interfaces="ipsec0=eth0"
klipsdebug=none
plutodebug=none
# plutoload=%search
# plutostart=%search
# plutowait=no

# Debug-logging controls: "none" for (almost) none, "all" for lots.
# klipsdebug=all
# plutodebug=all
# crlcheckinterval=600
# strictcrlpolicy=yes

conn %default
auto=add
type=tunnel
left=
right=
authby=secret
keyexchange=ike
esp=3des-md5-96i
keylife=24h

# OE policy groups are disabled by default
conn block
auto=ignore

conn clear
auto=ignore

conn private
auto=ignore

conn private-or-clear
auto=ignore

conn clear-or-private
auto=ignore

conn packetdefault
auto=ignore

# Add connections here.

# sample VPN connection
#sample# conn sample
#sample# # Left security gateway, subnet behind it, next hop toward right.
#sample# left=%defaultroute
#sample# leftcert=myCert.pem
#sample# leftsubnet=172.16.0.0/24
#sample# # Right security gateway, subnet behind it, next hop toward left.
#sample# right=10.12.12.1
#sample# rightid="<Distinguished name of right security gateway>"
#sample# rightsubnet=192.168.0.0/24
#sample# # To authorize this connection, but not actually start it, at startup,
#sample# # uncomment this.
#sample# #auto=start
conn vpn
auto=add
type=tunnel
left=200.X.X.11
leftsubnet=200.X.X.51/32
leftnexthop=
right=201.X.X.2
rightsubnet=192.168.1.0/24
rightnexthop=201.X.X.1
authby=secret
esp=3des-md5-96i
keylife=24h
pfs=yes
rekeymargin=9m
rekeyfuzz=25%

No ipsec.secret, tem apenas uma linha contendo a chave, substitui uma pela outra :

ipsec.secret

:PSK "CHAVE"


Dando um ipsec auto --status :
ipsec auto --status
000 interface ipsec0/eth0 201.X.X.2
000 %myid = (none)
000 debug none
000
000 "vpn": 192.168.1.0/24===201.X.X.2---201.X.X.1...200.X.X.11===200.X.X.51/32; erouted; eroute owner: #4
000 "vpn": ike_life: 3600s; ipsec_life: 86400s; rekey_margin: 540s; rekey_fuzz: 25%; keyingtries: 0
000 "vpn": policy: PSK+ENCRYPT+TUNNEL+PFS+UP; prio: 32,24; interface: eth0;
000 "vpn": newest ISAKMP SA: #3; newest IPsec SA: #4;
000
000 #4: "vpn" STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 85714s; newest IPSEC; eroute owner
000 #4: "vpn" esp.243f75c5@200.X.X.11 esp.bbaf1782@201.X.X.2 tun.1004@200.X.X.11 tun.1003@201.X.X.2
000 #3: "vpn" STATE_MAIN_I4 (ISAKMP SA established); EVENT_SA_REPLACE in 3042s; newest ISAKMP
000


No var/log/secure apresenta um erro na 1ª linha do ipsec.secrets :
/var/log/secure
6378 Aug 28 22:27:13 servervpn pluto[15662]: Starting Pluto (FreeS/WAN Version 2.05 X.509-1.5.3 PLUTO_ USES_KEYRR)
6379 Aug 28 22:27:13 servervpn pluto[15662]: Using KLIPS IPsec interface code
6383 Aug 28 22:27:13 servervpn pluto[15662]: Changing to directory '/etc/ipsec.d/crls'
6384 Aug 28 22:27:13 servervpn pluto[15662]: added connection description "vpn"
6385 Aug 28 22:27:13 servervpn pluto[15662]: listening for IKE messages
6386 Aug 28 22:27:13 servervpn pluto[15662]: adding interface ipsec0/eth0 201.X.X.2
6387 Aug 28 22:27:13 servervpn pluto[15662]: loading secrets from "/etc/ipsec.secrets"
6388 Aug 28 22:27:13 servervpn pluto[15662]: ERROR "/etc/ipsec.secrets" line 1: index ":PSK" illegal l eading `:' in IPv6 numeric address
6389 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: initiating Main Mode
6390 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: received Vendor ID Payload; ASCII hash: tm{COMENTARIO}31` A{COMENTARIO}24kQo*,{COMENTARIO}16c}/({COMENTARIO}0748{COMENTARIO}37
6391 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: Peer ID is ID_IPV4_ADDR: '200.X.X.11'
6392 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: ISAKMP SA established
6393 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: initiating Quick Mode PSK+ENCRYPT+TUNNEL+PFS+UP {using isakmp#1}
6394 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: ignoring informational payload, type IPSEC_RESP ONDER_LIFETIME
6395 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: sent QI2, IPsec SA established {ESP=>0xd6e0a488 <0x92ec5888}
6396 Aug 28 22:28:11 servervpn pluto[15662]: shutting down
6397 Aug 28 22:28:11 servervpn pluto[15662]: forgetting secrets
6398 Aug 28 22:28:11 servervpn pluto[15662]: "vpn": deleting connection
6399 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #2: deleting state (STATE_QUICK_I2)
6400 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #1: deleting state (STATE_MAIN_I4)
6401 Aug 28 22:28:11 servervpn pluto[15662]: shutting down interface ipsec0/eth0 201.X.X.20748Salve galera, peço ajuda para resolver este problema..

Estou com problemas para fechar uma vpn com Freeswan no Slackware, esta configuração já existia e alterei apenas os ip's, a chave PSK e inclui o 3-DES, quando subo a vpn aparentemente está fechada, mas quando mando um telnet para o destino ele vai por fora da vpn, abaixo vou colocar os arquivos de configuraçâo, se possível peço sua ajuda neste caso, muito obrigado :

IPSEC.CONF

# /etc/ipsec.conf - FreeS/WAN IPsec configuration file
# RCSID $Id: ipsec.conf.in,v 1.11 2003/06/13 23:28:41 sam Exp $

# This file: /usr/local/share/doc/freeswan/ipsec.conf-sample
#
# Manual: ipsec.conf.5
#
# Help:
# http://www.strongsec.com/freeswan/install.htm

version 2.0 # conforms to second version of ipsec.conf specification

# basic configuration
config setup
interfaces="ipsec0=eth0"
klipsdebug=none
plutodebug=none
# plutoload=%search
# plutostart=%search
# plutowait=no

# Debug-logging controls: "none" for (almost) none, "all" for lots.
# klipsdebug=all
# plutodebug=all
# crlcheckinterval=600
# strictcrlpolicy=yes

conn %default
auto=add
type=tunnel
left=
right=
authby=secret
keyexchange=ike
esp=3des-md5-96i
keylife=24h

# OE policy groups are disabled by default
conn block
auto=ignore

conn clear
auto=ignore

conn private
auto=ignore

conn private-or-clear
auto=ignore

conn clear-or-private
auto=ignore

conn packetdefault
auto=ignore

# Add connections here.

# sample VPN connection
#sample# conn sample
#sample# # Left security gateway, subnet behind it, next hop toward right.
#sample# left=%defaultroute
#sample# leftcert=myCert.pem
#sample# leftsubnet=172.16.0.0/24
#sample# # Right security gateway, subnet behind it, next hop toward left.
#sample# right=10.12.12.1
#sample# rightid="<Distinguished name of right security gateway>"
#sample# rightsubnet=192.168.0.0/24
#sample# # To authorize this connection, but not actually start it, at startup,
#sample# # uncomment this.
#sample# #auto=start
conn vpn
auto=add
type=tunnel
left=200.X.X.11
leftsubnet=200.X.X.51/32
leftnexthop=
right=201.X.X.2
rightsubnet=192.168.1.0/24
rightnexthop=201.X.X.1
authby=secret
esp=3des-md5-96i
keylife=24h
pfs=yes
rekeymargin=9m
rekeyfuzz=25%

No ipsec.secret, tem apenas uma linha contendo a chave, substitui uma pela outra :

ipsec.secret

:PSK "CHAVE"


Dando um ipsec auto --status :
ipsec auto --status
000 interface ipsec0/eth0 201.X.X.2
000 %myid = (none)
000 debug none
000
000 "vpn": 192.168.1.0/24===201.X.X.2---201.X.X.1...200.X.X.11===200.X.X.51/32; erouted; eroute owner: #4
000 "vpn": ike_life: 3600s; ipsec_life: 86400s; rekey_margin: 540s; rekey_fuzz: 25%; keyingtries: 0
000 "vpn": policy: PSK+ENCRYPT+TUNNEL+PFS+UP; prio: 32,24; interface: eth0;
000 "vpn": newest ISAKMP SA: #3; newest IPsec SA: #4;
000
000 #4: "vpn" STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 85714s; newest IPSEC; eroute owner
000 #4: "vpn" esp.243f75c5@200.X.X.11 esp.bbaf1782@201.X.X.2 tun.1004@200.X.X.11 tun.1003@201.X.X.2
000 #3: "vpn" STATE_MAIN_I4 (ISAKMP SA established); EVENT_SA_REPLACE in 3042s; newest ISAKMP
000


No var/log/secure apresenta um erro na 1ª linha do ipsec.secrets :
/var/log/secure
6378 Aug 28 22:27:13 servervpn pluto[15662]: Starting Pluto (FreeS/WAN Version 2.05 X.509-1.5.3 PLUTO_ USES_KEYRR)
6379 Aug 28 22:27:13 servervpn pluto[15662]: Using KLIPS IPsec interface code
6383 Aug 28 22:27:13 servervpn pluto[15662]: Changing to directory '/etc/ipsec.d/crls'
6384 Aug 28 22:27:13 servervpn pluto[15662]: added connection description "vpn"
6385 Aug 28 22:27:13 servervpn pluto[15662]: listening for IKE messages
6386 Aug 28 22:27:13 servervpn pluto[15662]: adding interface ipsec0/eth0 201.X.X.2
6387 Aug 28 22:27:13 servervpn pluto[15662]: loading secrets from "/etc/ipsec.secrets"
6388 Aug 28 22:27:13 servervpn pluto[15662]: ERROR "/etc/ipsec.secrets" line 1: index ":PSK" illegal l eading `:' in IPv6 numeric address
6389 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: initiating Main Mode
6390 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: received Vendor ID Payload; ASCII hash: tm{COMENTARIO}31` A{COMENTARIO}24kQo*,{COMENTARIO}16c}/({COMENTARIO}0748{COMENTARIO}37
6391 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: Peer ID is ID_IPV4_ADDR: '200.X.X.11'
6392 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: ISAKMP SA established
6393 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: initiating Quick Mode PSK+ENCRYPT+TUNNEL+PFS+UP {using isakmp#1}
6394 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: ignoring informational payload, type IPSEC_RESP ONDER_LIFETIME
6395 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: sent QI2, IPsec SA established {ESP=>0xd6e0a488 <0x92ec5888}
6396 Aug 28 22:28:11 servervpn pluto[15662]: shutting down
6397 Aug 28 22:28:11 servervpn pluto[15662]: forgetting secrets
6398 Aug 28 22:28:11 servervpn pluto[15662]: "vpn": deleting connection
6399 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #2: deleting state (STATE_QUICK_I2)
6400 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #1: deleting state (STATE_MAIN_I4)
6401 Aug 28 22:28:11 servervpn pluto[15662]: shutting down interface ipsec0/eth0 201.X.X.237
6391 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: Peer ID is ID_IPV4_ADDR: '200.X.X.11'
6392 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #1: ISAKMP SA established
6393 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: initiating Quick Mode PSK+ENCRYPT+TUNNEL+PFS+UP {using isakmp#1}
6394 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: ignoring informational payload, type IPSEC_RESP ONDER_LIFETIME
6395 Aug 28 22:27:16 servervpn pluto[15662]: "vpn" #2: sent QI2, IPsec SA established {ESP=>0xd6e0a488 <0x92ec5888}
6396 Aug 28 22:28:11 servervpn pluto[15662]: shutting down
6397 Aug 28 22:28:11 servervpn pluto[15662]: forgetting secrets
6398 Aug 28 22:28:11 servervpn pluto[15662]: "vpn": deleting connection
6399 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #2: deleting state (STATE_QUICK_I2)
6400 Aug 28 22:28:11 servervpn pluto[15662]: "vpn" #1: deleting state (STATE_MAIN_I4)
6401 Aug 28 22:28:11 servervpn pluto[15662]: shutting down interface ipsec0/eth0 201.X.X.2
#6 Comentário enviado por ferjun01 em 30/08/2008 - 13:55h
Estes são os requerimentos para fechar a vpn :

Fase I – Protocolo IKE – Não será aceito outro protocolo senão IKE
Fase I – Algoritmos de criptografia e integridade  3DES com MD5
Fase I – Grupo Diffie-Hellman Grupo 2 (1024 bits)
Fase I – Renegociar IKE Security Associations a cada 1440 minutos
Fase I – Aggressive Mode (DESABILITADO)
Fase I – Método de autenticação Shared Secret
Fase II - Protocolo IPSEC
Fase II – Algoritmos de criptografia e integridade
A Fase II seguirá os mesmos algoritmos da Fase I.
Fase II –PFS (Perfect Forward Secrecy) Grupo Diffie-Helmann 2 (1024 bits)
Fase II – Renegociar IPSEC Security Association a cada 3600 segundos
Fase II – Compressão de dados IPSEC (DESABILITADO)

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