Random TCP Resets

Posted by allenwei on Server Fault See other posts from Server Fault or by allenwei
Published on 2013-11-06T08:06:25Z Indexed on 2013/11/06 9:56 UTC
Read the original article Hit count: 157

Filed under:

networking

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tcp

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tcpdump

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netstat

We got randomly TCP "reset" error when we send request to remote server.

Log from remote server

Cisco TCP Connection Terminated,Nov 05 14:43:39 EST: %ASA-session-6-302014: Teardown TCP connection 640068283 for Outside:xxxx to xxxx duration 0:00:00 bytes 4160 TCP Reset-O

One my local machine I saw when I use netstat

100703 connections reset due to unexpected data
324186 connections reset due to early user close

I also use tcpdump to see what's wrong with it, I saw

xxxx.https: Flags [R.], seq 290, ack 1369, win 136, options [nop,nop,TS val 2871790533 ecr 1897173283], length 0

The problem just happened today, we didn't change anything on our server. Anyone know what's wrong with it?

Is it related to code we wrote send out request or related to linux configuration?

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