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Subjectudp traceroute dropping packets
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I came across this archived linux-kernel message:

http://www.uwsg.iu.edu/hypermail/linux/net/0007.2/0111.html

I am having the exact same problem as is outlined there, from a post three
years ago. Here's a summary:

"I think I've found a bug in UDP/ICMP code in the kernel using
traceroute.

To reproduce: Launch traceroute -n to some Linux system nearby
really quickly 3 times in the row; localhost won't work, it has to go
through network. Quick response is crucial. I used systems w/ in
the same physical network and a few routers between (still < 5 ms
response).

The effect: On third traceroute (or perhaps second/first, if you're quick
enough), ICMP port unreachable will not be sent to the UDP datagram. "

I reproduced this on a redhat 8.0 machine running kernel 2.4.23. Changing to
the -I option of traceroute (to use ICMP) works flawlessly. I'll be glad to
provide more information if you need it. Please CC, as I'm not subscribed.

- --Russell
- --

Russell Miller - rmiller@duskglow.com - Somewhere near Sioux City, IA.
Youth cannot know age, but age is guilty if it forgets youth
- Professor Dumbledore
Hi! I'm a .signature virus! Copy me into your ~/.signature, please!
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