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Status Future consideration
Created by Guest
Created on Jun 10, 2014

Websphere MQ - enhance CHLAUTH User mapping with wildcards

Enhance MQ v7.5 and v8 to provide a more flexible CHLAUTH feature for the USERMAP feature. Currently this allows mapping of a "client asserted" id to another id value for MCAUSER purposes.

However it does not allow wildcards in the client id mapping. This makes it unsuitable to replace our current usage of the BlockIP2 exit.

The CLNTUSER(client-user-name) option should allow wildcards in the specification of the "client-user-name" - such as "?" for single character wildcards and "*" for to match zero or more characters at the end of a string. For example "thisid??" or "this*" or "this?id*" .

THe choice to use wildcards (and any supposed risk) would be entirely the choice of the customer to use or not.

Idea priority High
RFE ID 54651
RFE Product IBM MQ
  • Guest
    Oct 15, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - WebSphere
    Product family - Integration
    Product - IBM MQ

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Connectivity and Integration
    Product - IBM MQ

  • Guest
    Jul 4, 2015

    Please see also PMR 54702 7TD 000 for another instance of this from our mutual customer. In their case, they wanted a default rule that says "map the channel MCAUSER to the one provided in the connection so long as it is not administrative, and if there is no ID in the connection request then map to "userfoo".

    In that case the mapping recognizes a blank user ID value as a target for mapping and handles two cases. One is that the thing at the other end is an old Java client. The other is the thing at the other end is a hacker with the MQ Jumping toolkit or similar and is fuzzing the protocol.

  • Guest
    Jun 18, 2014

    This is something we would like to add in a future MQ release.

  • Guest
    Jun 16, 2014

    We use BlockIP2 and cannot configure a solution using CHLAUTH at all without wildcarding, as we would have to map hundreds of user IDs to given IP addresses, and which then exceeds the maximum number of CHLAUTH specs that can be coded.
    Our environment is z/OS and LINUX, which should be included in addition to the AIX environment in the original request.