Netstat

The TSO NETSTAT and z/OS® UNIX netstat/onetstat commands provide the following information:

• Information about the status of the local host, including information about TCP/IP connections, network clients, gateways, and devices
• DNS cache information from the system-wide resolver
• The ability to drop connections for users who have the MVS.VARY.TCPIP.DROP statement defined in their RACF® profile

As new functions are added to TCP/IP in the z/OS Communications Server, new information is also needed from the Netstat command in terms of new command options, new Netstat reports, or changes to existing Netstat reports. Any program that post processes output lines from the Netstat command and depends on the content of these output lines from the Netstat command should be reviewed and possibly modified when maintenance or a new release of z/OS is being installed. For every new release, see Communications Server interface changes for z/OS 3.1 for a summary of the changes to the following Netstat commands and their associated report output:

• The DISPLAY TCPIP,,NETSTAT operator command
• The TSO NETSTAT command
• The z/OS UNIX netstat command