Traceroute Anomaly
Eli Dart
dart at nersc.gov
Fri Aug 20 10:30:17 PDT 2004
In reply to Gregory Kuhn <freebsd-net at lists.ctch.net> :
> Hello,
>
>
> I have discovered an anomaly (I am sure it was discovered long
> ago) when trying to traceroute to my FBSD 4.8 and 4.9 servers. Here are
> the details.
Have you set sysctl net.inet.udp.blackhole=1 ?
If so, the FreeBSD box will drop the traceroute UDP probes and you'll
never see the host itself in traceroute output.
--eli
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