Hitachi CMU Series User Manual page 127

6 MAINTENANCE
All possible state transitions between the connection states are as follows:
Processing (reception/transmission flag):
ACK: Positive acknowledgement flag
SYN: Connection check flag
FIN: End-of-connection flag
x: (no flag provided)
Close (x / FIN)
(ACK / x)
FINWAIT2
(FIN / ACK)
If the TCP protocol is used over more than 150 ports, no socket information is
displayed for the excess ports and the UDP protocol.
If the TCP protocol is used over more than 80 ports, some of the socket
information for the UDP protocol may not be displayed.
Passive open
(SYN / SYN + ACK)
SYN_RECEIVED
(ACK / x)
Close (x / FIN)
FINWAIT1
(FIN / ACK)
CLOSING
(ACK / x)
TIMEWAIT
CLOSED
LISTEN
(SYN / SYN + ACK)
ESTABLISHED
Waiting for a timeout to occur
NOTICE
6-26
Close
Active open (x / SYN)
Transmission (x / SYN)
SYN_SENT
(SYN + ACK / ACK)
(FIN / ACK)
CLOSEWAIT
LASTACK
CLOSED
Close (x / FIN)
(ACK / x)