CSTCP_CINET_PORTRNG_RSV

Description:

Checks whether the port range specified by INADDRANYPORT and INADDRANYCOUNT in the BPXPRMxx parmlib member is reserved for OMVS on this stack, when operating in a CINET environment. A port range is reserved on a TCP/IP stack using the PORTRANGE TCP/IP profile statement. The tcpipstackname suffix is the job name of the TCP/IP stack to which this check applies. Use CSTCP_CINET_PORTRNG_RSV_* to reference this check for all stacks.

Reason for check:

When operating in a CINET environment, the range of ports defined as available for CINET use by the INADDRANYPORT and INADDRANYCOUNT parameters in the BPXPRMxx parmlib member should be reserved (using the PORTRANGE TCP/IP profile statement) on every TCP/IP stack. This prevents a TCP/IP stack from allocating a port that CINET might subsequently attempt to use, which could result in an ABEND and the following message:

BPXF219I A SOCKETS PORT ASSIGNMENT CONFLICT EXISTS BETWEEN UNIX  SYSTEM SERVICES AND TCPIPstackname

z/OS® releases the check applies to:

z/OS V1R10 and later.

User override of IBM® values:

The following shows the default keywords for the check, which you can override on either a POLICY statement in the HZSPRMxx parmlib member or on a MODIFY command. This statement may be copied and modified to override the check defaults:

UPDATE
CHECK(IBMCS,CSTCP_CINET_PORTRNG_RSV_tcpipstackname)
DATE('date_of_the_change')
REASON('Your reason for making the update.')
ACTIVE 
SEVERITY(MEDIUM) 
INTERVAL(ONETIME)

Debug support:

Verbose support:

Parameters accepted:

Reference:

For more information on using multiple instances of TCP/IP in a CINET environment, see Considerations for multiple instances of TCP/IP in z/OS Communications Server: IP Configuration Guide.

Messages:

This check issues the following exception messages:

EZBH008E

See z/OS Communications Server: IP Messages Volume 2 (EZB, EZD).

SECLABEL recommended for multilevel security users:

SYSLOW - see z/OS Planning for Multilevel Security and the Common Criteria for information on using SECLABELs.