Allied Telesis AT-S63 - Manual (Page 205)

AT-S63 Management Software Command Line Interface User’s Guide
Section I: Basic Operations 205
ˆ Passive Opens - The number of TCP passive opens. Passive opens
are issued to wait for a connection from another host.
ˆ Attempt Fails - The number of failed connection attempts.
ˆ Established Resets - The number of connections established but have
not been reset.
ˆ Current Established - The number of current connections.
ˆ In Segs - The number of segments received.
ˆ In Segs Error - The number of segments received with an error.
ˆ Out Segs - The number of segments transmitted.
ˆ Out Segs Retran - The number of segments retransmitted.
ˆ Out Segs with RST - The number of segments transmitted with the
RST bit set.
The columns in the TCP Connections section are described here:
ˆ Total Number of TCP Listening sockets - The number of active
listening sockets. There can be a maximum of three listening sockets.
One is for the Telnet server, another for SSH, and the last for the web
browser server. If a server is disabled, its listening socket does not
appear in the table.
ˆ Total Number of TCP connections - The number of active Telnet, SSH,
and web browser connections to the switch.
ˆ Index - The internal socket ID number assigned to the connection.
ˆ Local Address - The IP address of the switch, followed by the TCP port
number used by the switch for the connection. The two values are
divided by a colon, as illustrated in Figure 24. The port number
indicates the type of TCP connection. A port number of 23 indicates a
Telnet connection, 22 an SSH connection, and 80 or 443 a web
browser HTTP or HTTPS connection, respectively.
Figure 24. IP Address and TCP Port Number
ˆ Foreign Address - The IP address of the management workstation that
initiated the connection, followed by the station’s TCP port number.
ˆ State - The state of the TCP connection. A state of ESTABLISHED
signals a successful TCP connection between the switch and the
management workstation. For definitions of all the TCP states, refer to
RFC-793.
169.254.37.1:23
IP Address
TCP Port
Number