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Article #188

Q Ip-forwarding diff from IP Masquerading, was Re: Sniffit for Linux 2.0.27

#188
From: Philip Shearer
Date: Sat, 01 Nov 1997 00:00
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G. Graham (glenn@intextonline.com) wrote:

: I'm wondering if this is possible, since I have Ip-forwarding turned
: on ( Masquerading ).  Will I have to disable my other two w95 machines

I thought that Ip-forwarding and Masquerading were two different concepts
with Ip-forwarding the packets from the w95 machines will be sent onto
the Internet with the original IP address of the w95 machines.

With IP Masquerading (using say socks5) then the addresses of the
original machines will be hidden/translated  by the socks5 software so
that all packets appear on the internet side to be from the single legal
IP address on the Linux box running socks5.

As I understand it, unless the service provider provides a registered 
set of IP addresses to the client, then the other boxes on a local
lan using Ip-forwarding will be sending out their illeagel (none
registered) IP addresses onto the internet.

If the client/user is provided with less than a full octal set of
addresses, ( <255 ), user will have to submask the set of addresses
on the local net so that UDP broadcasting will work properly.

Please could someone explain if I am wrong about how IP-forwarding works,
or confirm what I say if I am correct.

-- 
Regards Philip Shearer

Pager:	+44 (0)4325 174646			Tel: +44 (0)171 252 0527
Email:pbs@lmrln.demon.co.uk
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From: pbs@canada.lmrln.demon.co.uk (Philip Shearer)
Subject: Q Ip-forwarding diff from IP Masquerading, was Re: Sniffit for Linux 2.0.27
Date: 1997/11/01
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