I'm having an interesting (at least to me) connectivity problem on one of my servers, and I've never experienced this particular situation before. I was wondering if anyone had any words of wisdom about this...
The server is randomly becoming 'deaf to the world', as it were... It will be fine one minute, then all of the sudden after a period of being unused (no incoming connections, pings, etc) it ceases to respond to incoming ssh's, pop's, smtp's, etc...
The only thing that will revive it is a ping... Once I ping it once, it starts working just fine again, until next time it chooses to disappear.
I guess a more correct way to put it would be: It stops responding/processing TCP and UDP packets, and only resumes processing them once it receives an ICMP packet. Once the ICMP comes in, TCP and UDP both start working like a champ again, for a random amount of time.
I have checked the arp tables on my gateway router and also on any boxes that have contact with this machine. All show the correct ip-to-mac correllation...
I'm running kernel version 2.4.25, and have gone over the kernel networking options with a fine tooth comb and haven't found anything out of the ordinary.
Has anyone ever seen this type of behavior before? I must admit that I have been playing around with getting it fixed for a month now and have yet to be successful...
Any advice would be greatly appreciated...
Thanks in advance, Brad brad@greenepa.net
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