[1757] in linux-net channel archive
Re: Problem starting gated
daemon@ATHENA.MIT.EDU (Todd Fries)
Wed Jan 31 19:22:22 1996
To: ecloud@goodnet.com (Shawn Ruttledge)
Date: Wed, 31 Jan 1996 00:52:20 -0600 (CST)
Cc: sspoon@clemson.edu, linux-net@vger.rutgers.edu, grenoble@acoustic.com,
billg@radix.net
In-Reply-To: <199601292015.NAA04494@goodguy.goodnet.com> from "Shawn Ruttledge" at Jan 29, 96 01:15:19 pm
From: tfries@umr.edu (Todd Fries)
> But if somehow I could get a packet back from that distant www server that
> on the outside is addressed to the address my ISP assigned me for the PPP
> session, electron will get it, and then it needs some means of looking inside
> the packet to see that the packet really ought to go to positron.
...
> electron monitors outgoing packets... It sees the
> packet coming back, and realizes it's probably for positron, so it re-writes
> the numeric address as positron's address and sends it over the ethernet
> (assuming packets on ethernet still have tcp addresses in them; if not, then
> I guess it doesn't need to re-write the destination numeric address, but
> just map to positron's ethernet address).
This is called ip_masquerading, and it has been working since 1.3.45.
/usr/local/bin/ipfw a m all from 192.168.0.3/24 to 0.0.0.0/0
With this statement, I am currently 'masquerading' any machine on my
network (currently a 286 w/dos and a pentium w/win95) to internet.
LightHouse:# ipfw l a
Packets Bytes Proto From To Ports
43097 11468K all anywhere 131.151.253.0/24
89785 6992K all 131.151.253.0/24 anywhere
5408 314K all whizzer.cch.net anywhere
37348 27662K all anywhere whizzer.cch.net
835 33901 all einstein.cch.net lighthouse.cch.net
788 64043 all lighthouse.cch.net einstein.cch.net
5724 253K all Christian_Campus_Ho lighthouse.cch.net
8299 8814K all lighthouse.cch.net Christian_Campus_Ho
35133 1672K all 131.151.253.0/24 rocket.cc.umr.edu
18168 1600K all rocket.cc.umr.edu 131.151.253.0/24
1338 760K all umr.edu 131.151.253.0/24
1906 100605 all 131.151.253.0/24 umr.edu
LightHouse:#
It's been used abit since I started accounting, 2 days ago..
--
Todd Fries...tfries@umr.edu
http://www.cs.umr.edu/~tfries
