NGINX responding to keep alive after FIN

asked 2019-08-02 10:20:29 +0000

updated 2019-08-02 12:31:01 +0000

I'm trying to understand the issue where NGINX is not responding. After successful connection between port 60000 (NGNIX) and port 51874 (client), NGNIX is sending FIN to client. Client responds with Ack. After that client sends keep alive, NGNIX responds with Ack. For the second keep alive, NGNIX responds with RST. I don't understand what's happening. Can someone please explain.

https://i.stack.imgur.com/jAS9O.jpg

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answered 2019-08-02 14:13:35 +0000

Jaap

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nginx closed its end of the connection and wait for the client to do the same. It has enough of a timeout to wait 45 seconds for the first keep-alive, but then it times out before the second keep-alive after another 45 seconds, which ends up on a closed port, hence the reset. Thats the quick analysis of the screenshot.

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Asked: 2019-08-02 10:20:29 +0000

Seen: 807 times

Last updated: Aug 02 '19

NGINX responding to keep alive after FIN edit

1 Answer