As configurações do isc-dhcp-server que modifiquei estão desta forma:
# option definitions common to all supported networks...
option domain-name "
www.servidor.debian.com.br";
option domain-name-servers "
www.servidor.debian.com.br";
default-lease-time 3600;
max-lease-time 7200;
# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
autoritative;
# Use this to send dhcp log messages to a different log file (you also # have to hack syslog.conf to complete the redirection).
log-facility local7;
# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.
#subnet 10.152.187.0 nestmask 255.255.255.0 {
#}
# This is a very basic subnet declaration.
#subnet 10.254.239.0 netmask 255.255.255.224 {
# range 10.254.239.10 10.254.239.20;
# option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org;
#}
# This declaration allows BOOTP clientes to get dynamic addresses,
# whiche we don't really recommend.
#subnet 10.254.239.32 netmask 255.255.255.224 {
# range dynamic-bootp 10.254.239.40 10.254.239.60;
# option broadcast-address 10.254.239.31;
# option routers rtr-239-32-1.example.org;
#}
# A slightly diferent configuration for an internal subnet
subnet 192.168.0.1 netmask 255.255.255.0 {
range 192.168.0.30 192.168.0.50;
# option domain-name-servers ns1.internal.example.org;
# option domain-name "internal.example.org;
option routers 192.168.0.10;
option broadcast-address 192.168.0.255;
# default-lease-time 600;
# max-lease-time 7200;
}