Re: [Somewhat OT] - Why would a web server ping me?

[Frank Knobbe <fknobbe () knobbeits com>]

On Mon, 2003-03-10 at 16:58, Bob McDowell wrote:
> What's tying me up is the icmp.  Why would a non-user ping me?  Or, in
> other words, why would an automated process running on a web server
> ping one of its clients?


There are various reasons for ICMP packets, such as ICMP destination
unreachables. ICMP packets are also used for PMTU discovery. Most
hardening guides recommend to turn of PMTU discovery on Windows hosts
(which in my opinion sucks because the system will alway use 576 byte
packets [or something like that] and cripple it's performance).

Anyhow, without seeing a sample of the packets, or even just a better
description of ICMP type, code, source and destination address etc, I'm
not sure we can be of much help.

Regards,
Frank

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