You most definitely want a 2.14.18 or later kernel with netfilter.
The iptables tool for configuring netfilter can do, probably,
anything you want.
You can start with Dachstein or Bering and roll your own kernel,
though Bering is probably fine as is.
If you are a serious experimenter, I would recommend building a Debian system
to develop and play around on, with Bering as your target.
Nachman Yaakov Ziskind <[EMAIL PROTECTED]> on 06/07/2002 08:16:40 AM
To: [EMAIL PROTECTED]
cc: (bcc: Phillip Watts/austin/Nlynx)
Subject: Re: [leaf-user] Combining NAT with PAT
| > In NAT, the router essentially changes the source IP number to some other
| > (presumably better :-) one, and makes no other changes. So, your network
| > address is hidden, but you still need one public IP address for every host
| > on your network.
| > In PAT, the router changes the port number as well (to some random port
| > number), and keeps track of a table consisting of: the original source IP
| > number, and the port coded to the packet. The point is that the router can
| > inspect the reply packet, check the table, and send it off to the machine
| > that sent the source packet because it knows the port it arrived on. So,
| > many hosts can use the same IP number.
| >
| > Both NAT and PAT have their uses; we use both here.
|
| As I understand it, netfilter (iptables) can do what you want, although
| the terminology and approach may be unfamiliar. Start here:
| http://www.netfilter.org/documentation/HOWTO//NAT-HOWTO.html
|
| The Bering branch of LEAF uses a 2.4 kernel with netfilter. Dachstein
| still uses a 2.2 kernel.
|
| -Richard
*Groan* another distribution? My third. Okay.
Another question for the list: can Linux cum Dachstein a) alias the eth0
(external) interface to multiple ip numbers (in SCO unix we use 'ifconfig
alias', and b) pass along somehow (to ipchains or whatever) which ip number the
packet arrived with? If so, I suppose I could use ipchains to REDIRECT to a
local port, and then portfw to push it to the right machine. Well.
NYZ
--
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Attorney and Counselor-at-Law http://yankel.com
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