User IDs used by the intra-group queuing agent

The user IDs that are checked when the intra-group queuing agent opens destination queues are determined by the values of the IGQAUT and IGQUSER queue manager attributes.

The possible user IDs are:

Intra-group queuing user ID (IGQ)

The user ID determined by the IGQUSER attribute of the receiving queue manager. If this is set to blanks, the user ID of the receiving queue manager is used. However, because the receiving queue manager has authority to access all queues defined to it, security checks are not performed for the receiving queue manager's user ID. In this case:

• If only one user ID is to be checked and the user ID is that of the receiving queue manager, no security checks take place. This can occur when IGAUT is set to ONLYIGQ or ALTIGQ.
• If two user IDs are to be checked and one of the user IDs is that of the receiving queue manager, security checks take place for the other user ID only. This can occur when IGAUT is set to DEF, CTX, or ALTIGQ.
• If two user IDs are to be checked and both user IDs are that of the receiving queue manager, no security checks take place. This can occur when IGAUT is set to ONLYIGQ.

Send queue manager user ID (SND)

The user ID of the queue manager within the queue sharing group that put the message on to the SYSTEM.QSG.TRANSMIT.QUEUE.

Alternate user ID (ALT)

The user ID specified in the UserIdentifier field in the message descriptor of the message.

IGQAUT option specified on receiving queue manager	hlq.ALTERNATE.USER.userid profile	hlq.CONTEXT.queuename profile	hlq.resourcename profile
DEF, 1 check	-	SND	SND
DEF, 2 checks	-	SND +IGQ	SND +IGQ
CTX, 1 check	SND	SND	SND
CTX, 2 checks	SND + IGQ	SND +IGQ	SND + ALT
ONLYIGQ, 1 check	-	IGQ	IGQ
ONLYIGQ, 2 checks	-	IGQ	IGQ
ALTIGQ, 1 check	-	IGQ	IGQ
ALTIGQ, 2 checks	IGQ	IGQ	IGQ + ALT

Key:

ALT

Alternate user ID.

IGQ

IGQ user ID.

SND

Send queue manager user ID.

Parent topic: User IDs for resource security (MQOPEN, MQSUB, and MQPUT1)