snoop -d {INTERFACE NAME} port {PORT NUMBER}
might help
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TCP outgoing port problem
Hi,
I have a TCP IP program that runs on Solaris 8. It uses user defined outgoing IP port instead of setting it to "ANY" outgoing port available setting. My TCP program is running fine for a while but after some time, it will crash. When I try to restart the program, it fails to connect to the remote server. When I issue netstat -a, I can only see that the status is "SYNC SENT" instead of "ESTABLISHED" for my program connecton status. I am not sure on what could have resulted in this. I changed the outgoing port to another value and the program starts running and get connected again (temporary).
Is there any other solaris utilites that I can use to further trace the cause of the problem?
Thanks.
CM
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Answers
Hi,
After much investigation, I found that the TCP/IP connection to the remote servers areunstable.
This could be due to my recent testing which requires us to pull out the LAN cable and putting it back and also to use ifconfig to bring the interface UP and DOWN.
My application is very unstable now. Its client outgoing port becomes occupied and unsable after 8 hours of running without problems.. I try to re-run the application and now it fails to connect to the remote server. Is there a utility to check and reset TCP/IP port? Or do I need to perform a reboot on the Solaris 8 server? I re-run my application using another outgoing port and now it is able to connect to the remote server.
Thanks.
Regards,
CM
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by: jleviePosted on 2006-01-08 at 14:32:37ID: 15643976
Seems to me that the first order of business would be to figure out why the program crashes and fix that. The other problem should then go away. I think what you are seeing is the natural result of the kernel not knowing that the port is no loger in use because your program didn't close it. The kernel should eventually time out (after a few miutes) the port and close it.