We use a dual homed CentOS-6.3 host for our Internet gateway router. Its internal nic (eth1) is configured such that the address 192.168.0.1 is one of its aliases.
# cat /etc/sysconfig/network-scripts/ifcfg-eth1:192BOOTPROTO=none BROADCAST=192.168.255.255 DEVICE=eth1:192 IPADDR=192.168.0.1 IPV6INIT=no MTU="" NAME="LAN - Non-routable" NETMASK=255.255.0.0 NETWORK=192.168.0.0 ONBOOT=yes ONPARENT=yes
Internal packets routed to 192.168.209.41 are passing through this router out onto the network. I am afraid that the reason is not evident to me and I have been unable to locate an answer.
The primary address for eth1 has the following configuration:
# cat /etc/sysconfig/network-scripts/ifcfg-eth1 BOOTPROTO=none BROADCAST="" DEFROUTE=yes DEVICE=eth1 DOMAIN="hamilton.harte-lyne.ca harte-lyne.ca" GATEWAY=216.xxx.yyy.53 HWADDR=00:25:90:60:11:8D IPADDR=216.xxx.xxx.1 IPV4_FAILURE_FATAL=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_FAILURE_FATAL=no IPV6INIT=yes IPV6_PEERDNS=yes IPV6_PEERROUTES=yes MACADDR="" MTU="" NAME="LAN Link - eth1" NETMASK="" NETWORK="" NM_CONTROLLED=no ONBOOT=yes PREFIX=24 TYPE=Ethernet UUID=9c92fad9-6ecb-3e6c-eb4d-8a47c6f50c04
What configuration setting am I missing that will cause packets to 192.168.ccc.ddd to stay on the LAN and not try and pass though the WAN interface?