[ILUG] Routing ppp and a null modem cable

[Paul Jakma]

On Mon, 16 Aug 2004, Bryan O'Donoghue wrote:

> Box 1 and 2 can ping each other respectively.
>
> Box 1 has an interface called eth0 with 10.100.100.22 as it's ip.
>
> I still have to do a route add -net default gw 192.168.3.1 to Box 2 and even 
> after I do that, I can't ping any 10.100.100.x ips.

You should be able to ping  10.100.100.22 though, right?

As for the rest of the  10.100.100.x machines, is Box1 their default 
gateway? If not, they all need either a route for Box2 192.168.3.2/32 
via box1, or else their default to go via box1.

 	ip route add 192.168.3.0/30 via 10.100.100.22

Also, make sure box1 has ip_forward enabled:

 	echo 1 >  /proc/sys/net/ipv4/conf/all/forwarding

or if your distro has /etc/sysctl.conf:

 	echo 'net.ipv4.conf.all.forwarding = 1' >> /etc/sysctl.conf

 	sysctl -p

> But it doesn't...

Cause machines on the 10.100.100.x network probably either have no 
idea which direction 192.168.3.2 is, or their default route goes 
somewhere else, or box1 is not doing forwarding.

regards,
-- 
Paul Jakma	paul at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
Fortune:
I always wake up at the crack of ice.
 		-- Joe E. Lewis