Great Circle Associates Firewalls
(January 1996)
 

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Subject: Re: IP-address translation
From: Ron DuFresne <dufresne @ winternet . com>
Date: Wed, 24 Jan 1996 15:10:15 -0600 (CST)
To: Bruce Murphy <packrat @ ratbox . rattus . uwa . edu . au>
Cc: Firewalls Mailinglist <firewalls @ GreatCircle . COM>
In-reply-to: <199601241429 . WAA00638 @ ratbox . rattus . uwa . edu . au>
Posted-date: Wed, 24 Jan 1996 15:10:16 -0600

On Wed, 24 Jan 1996, Bruce Murphy wrote:

> In message <Pine .
 3 .
 89 .
 9601221631 .
 A25783-0100000 @
 lvp .
 lvp .
 nl>, 
>   Eddie Penninkhof wrote:
> > I'd like to be able to access an host that is located 'inside' a firewall
> > from outside the firewall. The host has a private IP-number (and is accessed
> > by many IP-'clients' inside the private net, so changing the number to a
> > registered number is definitely not preferred).
> > My preferred solution is to install an 'IP number-translator' on the firewall
> 
> If someone hasn't already suggested the Linux ip-forwarding stuff to
> you I'd be surprised. While being all very nice and working quite
> well, I found (about two months ago) that it had a rather fatal flaw
> of not retransmitting ICMP packets.
> 
> The packets I *really* needed were time exceeded during reassembly
> ones. Not being able to ping a machine for example. Traceroute
> woudln't work.

Question:  Did you also install icmpinfo???

Later,

Ron DuFresne
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Cutting the space budget really restores my faith in humanity.  It
eliminates dreams, goals, and ideals and lets us get straight to the
business of hate, debauchery, and self-annihilation." -- Johnny Hart
	***testing, only testing, and damn good at it too!***

OK, so you're a Ph.D.  Just don't touch anything.



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