routing(forwarding)

Hi to everybody!!
I have a little problem: a server with linux and 2 pci cards(A and B) on a
different subnet and 2 LAN linked on this 2 cards.
The problem is this:when i used the mandrakes's tool to configure the
network, it asked me which one was to LAN connected and which one to WAN.
Effectively on the eth1 i have a LAN but also a router (and so my WAN).
this is my network:

LAN(internal)->eth0 (server linux) eth1<- LAN(external)/WAN

with eth0: 192.168.0.0/24 (LAN)
and eth1: 192.168.1.0/24 (LAN/WAN)

now i would like this to networks could see each other (as a bridge)and
instead actually only one can see the other!!(the eth0 see eth1 but not the
opposite!!)
I add that I haven't a firewall that block them and for the subnet's problem
i have applyed a masquerading(To 0.0.0.0/0 (all) from 192.168.1.0/24
through eth0 and
To 0.0.0.0/0 (all) from 192.168.0.0/24 through eth1)
Any suggest?thank you!
Andrea

Hi,

Andrea Vescovo wrote:
> now i would like this to networks could see each other (as a bridge)and
> instead actually only one can see the other!!(the eth0 see eth1 but not the
> opposite!!)

Perhaps, google "bridge-utils" and brctl. That's one way to do this.

- Jan

Andrea Vescovo <(E-Mail Removed)> wrote:
> Hi to everybody!!
> I have a little problem: a server with linux and 2 pci cards(A and B) on a
> different subnet and 2 LAN linked on this 2 cards.
> The problem is this:when i used the mandrakes's tool to configure the
> network, it asked me which one was to LAN connected and which one to WAN.
> Effectively on the eth1 i have a LAN but also a router (and so my WAN).
> this is my network:

> LAN(internal)->eth0 (server linux) eth1<- LAN(external)/WAN

> with eth0: 192.168.0.0/24 (LAN)
> and eth1: 192.168.1.0/24 (LAN/WAN)

> now i would like this to networks could see each other (as a bridge)and
> instead actually only one can see the other!!(the eth0 see eth1 but not the
> opposite!!)

Note that "see" can be obscure if you are not the seer. So if bridge
has anything to do with the problem then my response is way off-base.

> I add that I haven't a firewall that block them and for the subnet's problem
> i have applyed a masquerading (To 0.0.0.0/0 (all) from 192.168.1.0/24
> through eth0 and To 0.0.0.0/0 (all) from 192.168.0.0/24 through eth1)

I think, but am not certain, that you should only need the rule on
(server linux) generated by:

iptables -t nat -A POSTROUTING -o eth1 -s 192.168.0.0/24 \
-d ! 192.168.1.0/24 -j MASQUERADE

Masquerading SNATs to the IP address of the outgoing interface, which
in your case would be the private IP address of eth1. That private
address requires another stage of NATing to a public IP source address
before being sent to the Internet, which I assume exists. So you want to
limit masquerading to 192.168.0.0/24 on linux server. And you don't want
linux server to masquerade traffic it sends to eth1 with a destination
address in 192.168.1.0/24.

I don't use mandrake and so don't know how to generate the same rule
using the tool to which you refer.

> Any suggest?thank you!
> Andrea

--
Clifford Kite
/* The generation of random numbers is too important to be left
to chance. */