Ola Martin,
a very popular NAT is the "NAPT" kind, which is also known as
"Masquerading". Linux 2.0.3x already supports Masquerading, and you can
use it with ipfwadm or with the new firewalling code called "ipchains".
You can find more info about Masquerading at http://ipmasq.cjb.net/
For ipchains, look at http://www.rustcorp.com/linux/ipchains/
To learn EVERYTHING there is about NAT, look at
http://www.csn.tu-chemnitz.de/~mha/linux-ip-nat/diplom/nat.html
There's also a IP Masquerading mini-HOWTO at
http://www.tor.shaw.wave.ca/~ambrose/ipmasq-HOWTO.html
Have fun!
Henrique Pantarotto
>What is the easiest, simplest, dummiest way to do
>packet filtering and NAT with Linux?
>
>I found and "ipsnat" package at
>http://proxy.iinchina.net/~wensong/ipnat/. In the
>other hand someone said me ipfwadm can do both jobs...
>
>Can I do it in another way? Which are my options?
>
>I don't wanna use a commercial firewall like
>SunScreen or Firewall-1 to do this...
>
>Thanks in advance. :)
>
>--
>Martin Humberto Hoz Salvador
>CITI S.A. de C.V. -- Technical Support Engineer
>Sendero Sur 285-A Col. Contry, Monterrey Nuevo Leon 64860, Mexico
>Phone: +(52)(8) 357-2267 x18 Fax: +(52)(8) 357-8047
>E-mail: [EMAIL PROTECTED] WWW: http://www.citi.com.mx
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>PGPKey ID: 0x0454E8D9
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Henrique Pantarotto
Coord. T�cnico Operacional
CEPAnet Internet Provider
Web: http://www.cepa.com.br
Tel. suporte: (011) 5506-8477
Sao Paulo - Brasil
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