Gert Doering wrote:
>
>
> Some people block ICMP, then IOS/unix traceroute works - some other
> people block UDP, then tracert works, some people block both, and you're
> out of luck figuring out what else they broke in their networks.
>
> (Yes - I do not like the idea of traceroute being filtered. I'm a
> network builder, and it's *SO* important to figure out what's wrong if
> people complain "I can't reach www.yahoo.com").
In that case you can/should use :
- tcptraceroute (http://michael.toren.net/code/tcptraceroute/)
- hping (http://www.hping.org/)
- ...
Nico.
-- Nicolas FISCHBACH (nico@securite.org) <http://www.securite.org/nico/> Senior IP&Security Engineer - Professional Services - COLT Telecom AG Securite.Org Team <http://www.securite.org/>
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