On Mon, 13 Sep 1999, Gamble, Justin wrote:
> For Linux, there are a few network monitoring tools that I know of:
> 1. NOCOL 4.2 - http://www.netplex_tech.com/software/nocol/
> <http://www.netplex_tech.com/software/nocol/>
> 2. Distinct - http://www.distinct.com/monitor/monitor.htm
> <http://www.distinct.com/monitor/monitor.htm>
> 3. Big Brother - http://maxlawran.ca/bb-dnld/
> <http://maxlawran.ca/bb-dnld/>
> 4. IPPL - http://www.via.ecp.fr/~hugo/ippl/
> <http://www.via.ecp.fr/~hugo/ippl/>
> 5. Ethereal - http://ethereal.zing.org/ <http://ethereal.zing.org/>
> 6. IPTraf - http://cebu.mozcom.com/riker/iptraf
> <http://cebu.mozcom.com/riker/iptraf> /
> 7. JAIL - http://www.wiw.org/~ams/jail/ <http://www.wiw.org/~ams/jail/>
>
>
> I think if you look closely, you may find that one of the above
> also can be used to generate traffic (? Maybe).
Big Brother won't generate traffic enough for testing the server the way
Svend wants, as it's designed to test for service availability, and notify
on outs, not to test performance so it has a fairly low impact on the
tested systems.
Getting a HEAD request every 5 minutes won't stress any server.:)
Apart from that, I can heartily recommend it as it's saved my ass several
times, including one where I got paged because of a dead named process,
only to find when I logged in 5 minutes after getting paged, that the
cracker whose buffer overflow had killed it and gotten him in, was still
logged on and visible. :)
> Justin
>
> -----Original Message-----
> From: Svend Eriksen [SMTP:[EMAIL PROTECTED]]
>
> Hello, I want to simulate traffic generated by users
> surfing on the web. There are several pc's connected trough
> a gateway, and I want to measure performance, latency and
> reilability on the gateway and also on the pc's.
> Are there any applications which can do this?
>
> Svend!
When you evaluate the application, make sure that it not only emulates
lots of fast connections, which is what most benchmarks do, but also does
lots of slow (modem speed) connections that hang around for a long time,
since it's the latter that tend to kill off webservers by taking up
resources for a long time, and they also make up the vast majority of
real life traffic.
--
Henrik Olsen, Dawn Solutions I/S URL=http://www.iaeste.dk/~henrik/
ZOOLOGY, n.
The science and history of the animal kingdom, including its king, the
House Fly (Musca maledicta). The Devil's Dictionary, Ambrose Bierce.
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