Change DDM TCP/IP Attributes (CHGDDMTCPA)
Where allowed to run: All environments (*ALL)
Threadsafe: NoParameters
Examples
Error messagesThe Change DDM TCP/IP Attributes (CHGDDMTCPA) command provides an interface to configure parameters for the use of DDM or DRDA over TCP/IP.
Restrictions:
*IOSYSCFG special authority is needed to use this command.
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Parameters
Keyword Description Choices Notes AUTOSTART Autostart server *NO, *YES, *SAME Optional, Positional 1 PWDRQD Password required *NO, *YES, *ENCRYPTED, *VLDONLY, *KERBEROS, *SAME Optional
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Autostart server (AUTOSTART)
Specifies whether to automatically start the DDM server when TCP/IP is started by the Start TCP/IP (STRTCP) command. The parameter takes effect the next time the STRTCP command is run. It also causes the DDM server to start when selected TCP/IP servers are started with the STRTCPSVR SERVER(*AUTOSTART) command.
The possible values are:
- *SAME
- The value does not change.
- *YES
- Start the DDM TCP/IP server.
- *NO
- Do not start the DDM TCP/IP server when starting TCP/IP, or when running the STRTCPSVR SERVER(*AUTOSTART) command.
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Password required (PWDRQD)
Specifies the minimum level of password security required when a client system connects to this system as a server. This parameter takes effect on the next DRDA or DDM connect request over TCP/IP.
The possible values are:
- *SAME
- The value does not change.
- *YES
- Refuse the connection if a DDM connection request does not contain a password associated with the userid.
- *NO
- Do not require a password on a DDM connection request. If a password is sent, it is ignored. See also *VLDONLY description.
- *ENCRYPTED
- Require the sending of an encrypted password along with the userid by a remote client system attempting to connect.
- *VLDONLY
- Do not require a password on a DDM connection request. If a password is sent, however, it must be valid for the associated userid.
- *KERBEROS
- Authentication occurs using Kerberos.
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Examples
Example 1: Displaying the Change DDM TCP/IP Attributes Display
CHGDDMTCPAThis command, when prompted, shows the current DDM TCP/IP attribute values.
Example 2: Starting the DDM TCP/IP Server Automatically
CHGDDMTCPA AUTOSTART(*YES)This command indicates that the next time TCP/IP is started by the STRTCP command, the DDM server is to be started automatically.
Example 3: Allowing DDM TCP/IP Connection Requests to be Accepted if They Contain at Minimum a Userid with No Password.
CHGDDMTCPA PWDRQD(*NO)This command indicates that on the next DDM TCP/IP connection request, a password will not be required in order to initiate the connection.
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Error messages
*ESCAPE Messages
- CPF3EC6
- Change DDM TCP/IP attributes failed.
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