[Gllug] Numpty Networking

[Joel Bernstein]

On Tue, Nov 16, 2004 at 12:22:37PM +0000, Darren Beale wrote:
> Here is my status:
> 
> 1) The bridge machine can ping machines on both 10.0.1.0/24 and 10.0.6.0/24
> 
> 2) a traceroute to an external machine from the bridge machine shows
> that it goes via the A networks' default gw, this is correct
> 
> 3) Machines on A can ping the B interface 10.0.6.2
> 
> 4) Machines on A CANNOT ping any other machines on the B network
> 
> 5)  /proc/sys/net/ipv4/ip_forward contains a 1 on the bridge machine
> 
> I'm guess it's something subtle that I've missed, but I can't see
> what, here is the routing table on the bridge machine FWIW
> 
> flump:~# route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 10.0.6.0        0.0.0.0         255.255.255.0   U     0      0        0 eth1
> 10.0.1.0        0.0.0.0         255.255.255.0   U     0      0        0 eth0
> 0.0.0.0         10.0.1.1        0.0.0.0         UG    0      0        0 eth0

Do the machines on the A network have a route to the B network? You've
got a machine 10.0.1.1 which can route between 10.0.1/24 and 10.0.6/24
but do the other machines on the 10.0.1/24 network know that they can
get to 10.0.6/24 via 10.1.1.1?

Try:
route add -net 10.0.6.0 netmask 255.255.255.0 gw 10.0.1.1

on the 10.0.1.x clients.

/joel
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