Great Circle Associates Firewalls
(September 1996)
 

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Subject: Re: IP Masquerading
From: Bill Stout <bill . stout @ hidata . com>
Date: Wed, 04 Sep 1996 17:45:37 -0700
To: Jeffrey Barber <jab @ rock . anchorage . net>, "'firewalls @ GreatCircle . COM'" <firewalls @ GreatCircle . COM>

I think that's what a proxy's for.  See Catapult.

At 01:05 PM 9/4/96 -0800, Jeffrey Barber wrote:
>Hello All,
> I am a Windows and Linux user. With Linux I can configure it to do 
IP Masquerading. This allows me to have multiple computers on my local 
net access the internet thru 1 internet connection with only 1 valid 
IP address. What happens is the Linux computer changes the source 
address to that of the valid IP address and when the response comes 
back, Linux then passes the data back to the requesting local computer. 
This process is not using any proxy's and I have full TCP/IP capability 
from all local computers. I guess this may be what some call IP Spoofing. 
This process is very usefull for we all heard that there may be a shortage 
of IP Address. This will solve the problem or at least cut down on the 
requests for additional Address from the NIC.
>
>My question is, can NT 3.51 or NT 4.0 be configured to do the same thing, 
possibly using some kind of firewall software. Also can it be done without 
using proxies. The IP Masquerading process is part of the Linux kernel and 
I am hoping that a kernel modification can be done to NT if this process is 
not already there. This can be a HUGE Plus for NT if Microsoft can do it.
>
>TIA
>jab @
 rock .
 anchorage .
 net
>System Administrator
>
>
>
>
>


Indexed By Date Previous: RE: NT port activity list
From: Bill Stout <bill . stout @ hidata . com>
Next: Re: C2 certified OS that can run a firewall
From: Ng Pheng Siong <ngps @ pacific . net . sg>
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From: Peter Yau <pyau @ carfax . ims . advantis . com>
Next: Protocol probes
From: Rob Sansom <sansom @ connectix . com>

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