Edubuntu routing question -- from external to internal (fwd)

[Tom Wolfe]

So to give some background:

1) I have a large network dominated by Windows AD & Windows clients
2) I have two smaller networks that are dominated by LTS & clients, one is 
K12LTSP 6.0, the other is Edubuntu/Gutsy
3) Within the two LTSP networks I do have a few Windows clients and 
network printers. I want these printers to be available to all three 
networks.
4) I have a firewall/router (Endian) that has two permanent routes, one 
pointing to the K12LTSP server, the other to the Edubuntu/Gutsy server.
5) I can ping/access any IP address within the K12LTSP network no problem, 
but I'm still trying to figure out how to access IP addresses within the 
Edubuntu network.
6) Last week, in an effort to grant access from within the Edubuntu 
network to the rest of the network (which worked) I followed the NAT/Thin 
Client How-To to enable ip forwarding AND ip masquerading, but I'm 
wondering if masquerading is really what I want here since I want all 
hosts to be transparent to each other; and I'm wondering if this is what 
is screwing things up?

Any pointers?

Regards,
Tom Wolfe


On Wed, 21 Nov 2007, Oliver Grawert wrote:

> hi,
> On Di, 2007-11-20 at 12:52 -0500, Tom Wolfe wrote:
>> Hi,
>>
>> I'm trying to allow access from the eth1 subnet (external) to the eth0 subnet
>> (ineternal/Thin Client)
>>
>> I have a route set up on the external network (192.168.192.0/255.255.252.0) as
>> follows:
>>
>> route add -net 192.168.100.0 netmask 255.255.255.0 gw 192.168.192.18
> additionaly you need to enable ip forwarding though echoing 1
> into /proc/sys/net/ipv4/ip_forward
> like:
>
> echo 1|sudo tee -a  /proc/sys/net/ipv4/ip_forward
>
> ciao
> 	oli
>