How to setup a Linux Box as a gateway/firewall between two networks?

[Patrizio Trinchini]

Hi Folks,

I'm quite new to linux networking so I don't know if this
question may be considered a silly one!
I'd like to use a multi-homed Linux Box as a gateway/firewall
between two networks, as in the following ascii art layout:

(please, if the drawing is not clear, change the font to a fixed one!)

--+--
Unsec
Box
--+-- (146.84.180.10)
|
----+-----+-------------- 146.84.180.x
|
--+-- Unsecure IF (146.84.180.1)
Linux
Box
--+-- Secure IF (10.0.0.1)
|
----------+-------+------ 10.0.0.x
|
--+-- (10.0.0.10)
Sec
Box
-----

Eg. I'd like to be able to ping/telnet/ftp/... the Sec Box
from the Usec Box, using the Linux Box as a NAT, as well as
beeing able to ping/telnet/ftp/... the Unsec Box from the
Sec Box; in other words, I'd like to separate the two networks
to be able to control every packet in transit using Linux
ipchains or something similar.

Is this a possible dream?

Is there someone that can suggest me the right way to do the trick?

Thanks a lot for your time and attention!!

Regards/Ciao,

Patrizio

[W. E. Earley]

take a look at FreeS/WAN http://www.freeswan.org
I think it'll do you a better job of what your looking for.

In article <3be11b19$1...@newssrv.quipo.it>, "Patrizio Trinchini"