Update TCP/IP profile

Activate or deactivate the AT-TLS function for the TCP/IP stack.

Before you begin

To determine if the AT-TLS function is activated for the TCP/IP stack, you can use the following command to display TCP/IP configuration data:

DISPLAY TCPIP,<procname>,NETSTAT,CONFIG

For more information about this command, see the following topics in z/OS Communications Server: IP System Administrator's Commands: DISPLAY TCPIP command and DISPLAY TCPIP,,NETSTAT.

About this task

The AT-TLS function is activated by the TTLS parameter on the TCPCONFIG statement. The TTLS option must be specified to activate the AT-TLS function for the TCP/IP stack. Specifying NOTTLS deactivates the AT-TLS function for the TCP/IP stack.

The TCPCONFIG statement exists in the TCP/IP profile (PROFILE.TCPIP).

For more information, see the following topics in z/OS Communications Server: IP Configuration Reference: TCP/IP profile (PROFILE.TCPIP) and configuration statements and TCPCONFIG statement.

Note: OBEYFILE can also be used to dynamically enable or disable TTLS .

Procedure

To activate or deactivate the AT-TLS function for the TCP/IP stack, update the TCPCONFIG statement in the current TCP/IP profile, as follows:

To activate the AT-TLS function, specify the TTLS parameter, as follows:
```
TCPCONFIG     TTLS
```
To deactivate AT-TLS function, specify the NOTTLS parameter, as follows:
```
TCPCONFIG     NOTTLS
```
Note: NOTTLS is the default value.