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Zen_Y
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Sep 03, 2024

RST-ACK sent by the server after there is a FIN-ACK from the client

Hello

I have a few questions related to the type of connection that is continuous (longlive connection), some connections on the device experience RST-ACK sent by the server after there is a FIN-ACK from the client.

in transactions, it occurs like an intermittent transaction.
is this RST-ACK from the server the cause? or is the RST-ACK that is done after this FIN-ACK normal, because in transactions, the response from the request has been sent.

Thank you

  • in the vserver's server side tcp profile, ensure that keepalive is enabled.

    https://my.f5.com/manage/s/article/K13004262

    at least in will prevent in between firewall and server's tcp stack to mark the tcp connection as stale.

    server's application layer might not be affected by tcp keepalive.
    it may have idle timeout based on application transaction inactivity.