Re: Semi-simple Routing Question

[Harry Putnam <reader newsguy com>]

Adrian Hunt <ahunt7616 yahoo com> writes:

> Without even addressing the firewall aspect at this
> point, I'm simply trying to take one machine with 2
> network interfaces (192.168.1.1 and 192.168.2.1) and
> convince it to route IP traffice such that 192.168.2.X
> can ping, telnet to, print to, etc. 192.168.1.X.

> I've echo'd 1 > /proc/sys/net/ipv4/ip_forward, and
> hoping for a miracle I installed 'routed' and started
> it to no avail.  All the firewall tables are
> completely flushed.  All machines have 192.168.x.1 set
> as their default route, x being whichever subnet
> they're attached to and configured properly on.  The
> routing box can see/ping all the desktops on both
> networks, and vice-versa.  I simply can't get traffic
> from one desktop to another.

You provided no diagnostics what ever.

ouput of netstat -nr would  be usefull here.
But probabley wouldn't show the one critical gateway, in my
experience.

I think you need two gateways for the machine with 2 nics

cat /etc/sysconfig/network-scripts/ifcfg-eth0 should look something
like:
(Please note that my setup is on 192.168.0.X  and 192.168.1.X 
 so adjust accordingly)

The important thing to note here is that each has a gateway set to
its own subnet.  Where the gateway is what is at the other end of the
respective wires

  USERCTL='no'
  NETMASK='255.255.255.0'
  BOOTPROTO='none'
  HWADDR='00:03:47:fa:4b:13'
  DEVICE='eth0'
  IPADDR='192.168.0.7'
  GATEWAY='192.168.0.1'
  TYPE='Ethernet'
  ONBOOT='yes'
  NETWORK='192.168.0.0'
  BROADCAST='192.168.0.255'

Cat /etc/sysconfig/network-scripts/ifcfg-eth1:

  USERCTL='no'
  NETMASK='255.255.255.0'
  BOOTPROTO='none'
  HWADDR='00:04:75:9b:e5:0d'
  DEVICE='eth1'
  IPADDR='192.168.1.5'
  GATEWAY='192.168.1.1'
  TYPE='Ethernet'
  ONBOOT='yes'
  NETWORK='192.168.1.0'
  BROADCAST='192.168.1.255'