I was wondering if someone could shed some light on the issue im having, Currently running a zabbix server which monitors others server on another sites. I did see that recently been losing connection to the agents. I want to make sure its not the firewall. i check the states and i see lots of
whats odd is that i haven't changed anything on the firewall nor zabbix. I was reading about putting on the NAT rule States timeout to 1 but not sure if thats the issue
whats odd is that on the agent side i can telnet both sides no issue
after few mins the agent comes back online
FIN_WAIT_2 means it's in a state after one side or the other cleanly closed the TCP connection, but the other hasn't yet responded to finalize the closing handshake. It had to have responded earlier to a termination request or it couldn't have reached the FIN_WAIT_2 state (it would be stuck on FIN_WAIT_1 or CLOSE_WAIT.
You still have a state there, so it's not likely to be pfSense, but it could be something local on the client or server.