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Old 10-05-2009, 04:51 AM   #1
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Can someone tell me what kernel: =40142 WINDOW=16060 RES=0x00 ACK URGP=0 means please

Can anyone tell me what this means. I've just noticed it on our redhat server.
kernel: =40142 WINDOW=16060 RES=0x00 ACK URGP=0

Google is not helping me this time

Old 10-05-2009, 06:26 AM   #2
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Need more info, where are you seeing this?
Old 10-05-2009, 07:05 AM   #3
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Sorry. Its in /var/log/messages.
We have a tool that monitors the servers and it alerted this morning saying smtp was down which is why I logged in. found nothing about smtp but only this.

Old 10-05-2009, 07:09 AM   #4
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To me this looks like firewall logs like iptables -j LOG --tcp-options provides. Also its not a whole line. There should be Source and destination ip and port. Look a few lines up if you can find something like it.


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