I just encountered an odd network stack glitch and wondered if anyone has seen this before, or knows what could cause it. When I connect to services on localhost (127.0.0.1) if there is a process listening, it works OK as expected. If there is no process listening, I should get a NAK and see a connection refused message. With this glitch, that was not happening. And this was with 127.0.0.1 to 127.0.0.1. Nothing was listening, but the SYN attempts were all that were happening. If there was something listening that worked OK. Connections to other hosts worked as expected. A reboot fixed it. Sure seemed odd to me.

Next time instead of talking about issues please try to support your findings with a more "formal" report including kernel version, technical details like packet dumps et cetera.


//NTLB

Talking about an issue is specifically what I wanted to do, before filing any formal report. In this case, there isn't much to report, except that it is kernel "2.6.35-24-generic" in Ubuntu 10.10 amd64. Some kinds of problems, like this one, are not something so easily dealt with, because of their extreme intermittent behavior. Talking about it first might lead to some insight in how to go about coming up with technical details.

I'm also curious how it is your reply to my post precedes it by two days.