tcpflow stores all captured data in files that have names of the form: [timestam...

   tcpflow stores all captured data in files that have names of the form:

   [timestampT]sourceip.sourceport-destip.destport[--VLAN][cNNNN]
   where: timestamp is an optional timestamp of the time that the first packet was seen

https://github.com/simsong/tcpflow/blob/master/doc/tcpflow.1...

   .B t
   Prepends each filename with a Unix timestamp (seconds since epoch).
   .B T
   Prepends each filename with an ISO-8601 timestamp.