Re: IP forwarding problem
On Fri, 2006-01-27 at 14:52 +0000, Oliver Elphick wrote:
> Can anyone help with this network problem, please?
>
> This machine is an internal router, with two network cards. iptables is
> not configured in the kernel, since masquerading and filtering is not
> required. (There is a separate firewall machine.)
>
> 192.168.2 (eth0) is a network with Windows machines. Packets to and
> from that network are no longer being forwarded. The routing table
> appears to be correct and IP forwarding is turned on.
>
> Machines on 192.168.2.* are able to ping 192.168.1.18 (the other network
> card on the routing machine) but they cannot ping any other machine on
> the 192.168.1 network. Similarly, the router can ping 192.168.2.* but
> no other machine on 192.168.1 can do so.
>
> This set up was working until it was shut down and rebooted :-(
To close this thread for the benefit of readers of the archives, the
problem was that the routing table on the main gateway did not have an
entry for the 192.168.2.0 network.
All the server machines had been shut down and rebooted together because
the UPS batteries had to be replaced. It seems that the gateway machine
came up before the internal router and was unable to add a route for
192.168.2.0 because the router was not yet responding.
Oliver Elphick
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