Could you tell me when TCP session is timeout, does PA firewall send a TCP reset(RST) packet to endpoint server/client or just close and delete the session from own session table without sending any packets ?
if a tcp session times out (no packets received in X time) the session will simply close and no rst or fin is sent from the firewall
no, a RST can only be sent as a response to something. You'd either need to have a deny rule with the action set to reset, or a custom threat signature with action reset
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