Re: easy way to scan for issues with path mtu discovery?

["Marcin Antkiewicz" <firewallwizards () kajtek org>]

> Does anyone know of an easy way to scan for issues with path mtu discovery
> along a hop path?  E.g. if you think someone is black-holing along a route,
> or even on the endpoint host, could you use some obscure nmap flag to find
> out for sure, and also to identify the offending hop/router/host?  What tool
> would you use to test for this, and how would you do such a test?



Patrick,

tracepath on Linux and mturoute on windows will tell you what is the path's
mtu. If I remember correctly, mturoute gets confused by some of the icmp
messages.

--
Marcin Antkieiwcz

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