I am trying to find out a way to filter out packets specifying abnormal connection termination in wireshark. I mean is there any tcp.connection.terminated filter in wireshark??
TCP FIN is a normal termination.
Abnormal connection terminations would have TCP RST flag enabled:
tcp.flags.reset == 1
A connection can also time out (keepalive SYN is sent more than once, no ACK received back).
You can filter for the TCP SYN flag using display filter
tcp.flags eq 0x02 and look for connections that do not receive ACK.