TCPCONNTABLE attributes

Use the TCPCONNTABLE attribute group to monitor the system's existing TCP connections. The Management Information Base (MIB-II) detailed in RFC1213, for use with network management protocols in TCP/IP-based internets, establishes and defines the attributes of this group.

The TCPCONNTABLE attributes are available for the SNMP Data Provider.


Agent Name Identifies the SNMP host name relating to a particular sample of data. A valid entry is an alphanumeric text string, with a maximum length of 64 characters.

tcpConnLocalAddress The local IP address for this TCP connection. In the case of a connection in the listen state that is willing to accept connections for any IP interface associated with the node, the value 0.0.0.0 is used. A valid entry is an alphanumeric text string, with a maximum length of 32 characters.

tcpConnLocalPort The local port number for this TCP connection. A valid entry is an integer of up to four digits.

tcpConnRemAddress The remote IP address for this TCP connection. A valid entry is an alphanumeric text string, with a maximum length of 32 characters.

tcpConnRemPort The remote port number for this TCP connection. A valid entry is an integer of up to four digits.

tcpConnState The state of this TCP connection. The only value that can be set by a management station is deleteTCB(12). Accordingly it is appropriate for an agent to return a 'badValue' response if a management station attempts to set this object to any other value.

If a management station sets this object to the value deleteTCB(12), then this has the effect of deleting the TCB (as defined in RFC 793) of the corresponding connection on the managed node, resulting in immediate termination of the connection.

As an implementation-specific option, you can send a RST segment from the managed node to the other TCP endpoint (note however that RST segments are not sent reliably). A valid entry is an alphanumeric text string, with a maximum length of 64 characters. Possible values include:

1 = closed

2 = listen

3 = synSent

4 = synReceived

5 = established

6 = finWait1

7 = finWait2

8 = closeWait

9 = lastAck

10 = closing

11 = timeWait

12 = deleteTCB