[PLUG] Routing Query

Richard Langis richard.langis at sun.com
Mon Sep 16 16:06:37 UTC 2002


Hello everybody.

I've got a minor routing issue that I just can't quite seem to figure 
out.  Here's my pathetic attempt at ascii art to illustrate the relevant 
machines on the network:

internet------\
                \                                          _______
                 \                            **          |      |
              |--------|     |---------|     /  \         |      |
              |firewall|-----|file serv|-----|AP|     *--/laptop/
              |--------|     |---------|     |--|       /______/
                 1.251          1.252         2.x         2.3


There's a switch between the firewall and the fileserver where most of 
the other machines connect.  The fileserver also acts as a dhcp server, 
and ssh connections from the outside are forwarded there as well.

Since the wireless AP is on eth1 on the fileserver, I put the wireless 
network on the 192.168.2.0 network, whereas the wired network is 
192.168.1.0.  The default route is pointed at the firewall.  The laptop 
can login to the fileserver, and ping the 1.252 interface from itself 
(not only while logged in remotely).  It cannot, however, ping any other 
host on the 1.x network.

Here's the output of 'route -n' on the fileserver:


Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
127.0.0.0       0.0.0.0         255.255.255.255 UH    0      0        0 lo
192.168.2.0     192.168.2.252   255.255.255.0   UG    0      0        0 eth1
192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
192.168.1.0     192.168.1.252   255.255.255.0   UG    0      0        0 eth0
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         192.168.1.251   0.0.0.0         UG    0      0        0 eth0

I *think* it looks okay, but I could be totally wrong.  Everything I've 
googled for doesn't really apply to my situation - most hits I've gotten 
are people setting up ONE dual-homed machine (ie a firewall), not TWO on 
the same network.

Anyone want to take a swing with the cluestick?

-R





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