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Article #25

Re: IP Masquerade

#25
From: Simon Leinen
Date: Tue, 14 Sep 1999 00:00
59 lines
3113 bytes
Rainer,

sorry for the late reply - I finally found some time to clean up my
mailbox.

>>>>> "rj" == Rainer Joswig <joswig@lavielle.com> writes:
> At 13:59 Uhr +0200 15.07.1999, Simon Leinen wrote:
>> >>>>> "rj" == Rainer Joswig <joswig@lavielle.com> writes:
>> > Well, learning to hack IP in Lisp - sounds like a challenge.
>> 
>> On the contrary!!!
>> 
>> Lisp machines are great for hacking networking protocols.  Imagine
>> modifying the Ethernet driver source to add a new feature, and
>> activate it just by typing C-M-a.  When you make mistakes you usually
>> get popped into the debugger, fix the bug, type C-M-a and try again.

> Yes, I was thinking that you need to learn a bit about
> the IP and networking implementation of Genera.
> Not that much is documented, IIRC.

On the other hand, the sources are generally quite readable.

>> Seriously, doing experimental implementations of networking protocols
>> would be the number one reason for me to get a LispM again.

> Did you lose it? ;-)

Well, I changed jobs.  I will never forgive my old employer that he
threw an NXP1000 into the trash without contacting me - I would really
have liked that one for doing network hacking, sigh.

>> Have fun (I bet you will),
>> -- 
>> Simon.
>> (-: who still has an SNMP agent for Genera lying around - but no LispM )-:

> Hey, several months ago I loaded it into my MacIvory and it worked
> (I can't remember if I had to patch much...). :-)
> I'd need more time to learn about it, but it seems attractive
> - especially since I'm working for a company which
> uses routers and switches from Cisco, Ascend, Asante, 
> Bintec, Netopia, SUN, ...
> I'm still dreaming of a network control system running
> on my Lispm... Your SNMP agent would be a nice building block.

Well the *agent* part is mostly interesting if you have many LispMs
that you want to manage.  There is also a manager part that can be
used to manager other boxes.

I do use the agent part in server programs written in Lisp - that way
I can use SNMP to track server statistics, see e.g.
	http://www.switch.ch/lan/stat/fluxoscope/
contains MRTG plots of the number of accounting records processed by
our traffic accounting system which runs under Allegro 5.0.1.

Cheers,
-- 
Simon.
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From: Simon Leinen <simon@switch.ch>
Subject: Re: IP Masquerade
Date: 1999/09/14
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