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MQSeries.net Forum Index » General IBM MQ Support » Problem Connecting MQClient -MQServer in Different machines

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ankurlodhi
PostPosted: Fri Sep 16, 2011 6:36 am    Post subject: Reply with quote

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Joined: 19 Oct 2010
Posts: 266

i know its not a very gud idea to set the value to mqm but for sometime it can solve the problem,


but thinking other than this, it may be u can give authority to mqm group so when a member who is the member of mqm group can put message on the queue.
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mqjeff
PostPosted: Fri Sep 16, 2011 6:41 am    Post subject: Reply with quote

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Joined: 25 Jun 2008
Posts: 17447

Yes, it can temporarily solve the problem.

But it removes the ability to solve the problem permanently.

And in general, anything that is an application queue should have application-specific permissions, and all application users should be authorized into an application-specific role and NOT put into the mqm group for any reason.

The only users that should be in MQM are a) the mqm/musr_mqadmin user, b) the os level root user, c) specific mq administration ids.

And even c) is questionable. c) should be better handled through proper mq security to allow specific users who are properly authorized to connect to secured channels that do have mcauser(mqm) or those same specific user ids are capable of sudo/su/login as mqm user instead. (although ideally in a manner that produces a log of the time and the actions taken)
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dprogwmb
PostPosted: Fri Sep 16, 2011 6:44 am    Post subject: Problem SOLVED!!! Reply with quote

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Joined: 19 Jul 2011
Posts: 96

dprogwmb wrote:
ankurlodhi wrote:
alter the queue you are trying to put message on and set the mcauser valuve to mqm (remember its a string value so when you mention it do it with '' quotes )


then try and tell what u get.

Thanks for your answer ankurlodhi!!

I tried using MQ Explorer v7, setting MCAUser to user "admin" CHANNEL1 (SVRCONN), and I'm also getting the same error... "2035" in client side.
Some definitions:
User "admin" , is the user where the MQ client runs ... in machine A (Win XP)....
Machine B,is where runs the MQ server (also Win XP)...
Any other -"constructive"- suggestion?

Problem solved
I created the user "admin" from the client in the win xp server, and added the user "admin" to the group mqm... and then set on the CHANNEL1 (SVRCONN) on MCA User the user admin... and worked fine . Was it a bad solution? Any conclusion opinion? REGARDS EVERYBODY.
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ankurlodhi
PostPosted: Fri Sep 16, 2011 6:49 am    Post subject: Reply with quote

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Joined: 19 Oct 2010
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i agree with jeff, that it should be specific,

so rather than going for a perticular user, do it to a group, and please do let us know what setmqaut command you are giving.
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mqjeff
PostPosted: Fri Sep 16, 2011 7:02 am    Post subject: Re: Problem SOLVED!!! Reply with quote

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Joined: 25 Jun 2008
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dprogwmb wrote:
I created the user "admin" from the client in the win xp server, and added the user "admin" to the group mqm... and then set on the CHANNEL1 (SVRCONN) on MCA User the user admin... and worked fine . Was it a bad solution? Any conclusion opinion? REGARDS EVERYBODY.


It is a bad solution because you put the user in the MQM group.

That user now has full administrative privileges to the entire queue manager. And because you've set that user name as the MCAUSER, anyone who establishes a network connection to the mq listener and knows the name of the SVRCONN can now have full administrative access to the queue manager.

So remove the admin user from the mqm group, REFRESH SECURITY, and then issue setmqaut commands for 'admin' on the qmgr machine until you can connect and open your queue.

And then think about securing the channel.
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Vitor
PostPosted: Fri Sep 16, 2011 7:05 am    Post subject: Reply with quote

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Location: Texas, USA

ankurlodhi wrote:
it may be u can give authority to mqm group so when a member who is the member of mqm group can put message on the queue.


This sort of comment will not impress the Nobel committee.

A fundamental principle of WMQ is that any member of the mqm group can do anything to the WMQ software. So you can't "give" authority to mqm group to put a message to a queue; that group already has it. Likewise you can't take it away. This is why putting mqm in a MCAUser is so dangerous; anyone using that channel can do anything they want to the queue manager. This includes putting messages to any queue, and indeed creating/deleting queues as they see fit.
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Vitor
PostPosted: Fri Sep 16, 2011 7:07 am    Post subject: Re: Problem SOLVED!!! Reply with quote

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Location: Texas, USA

dprogwmb wrote:
Was it a bad solution? Any conclusion opinion?


It's a bad solution. Anyone who uses that channel can administer any aspect of the queue manager without restranint. See my explaination above, and my anaology above about fixing a problem with the lock on a door by removing the door completely.
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ankurlodhi
PostPosted: Fri Sep 16, 2011 7:07 am    Post subject: Reply with quote

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u did well to go that far but indirectly u did the same thing which i told u with setting the mca user to mqm,

ur close to solution, u just need to push some more buttons.
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Vitor
PostPosted: Fri Sep 16, 2011 7:10 am    Post subject: Reply with quote

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Location: Texas, USA

ankurlodhi wrote:
u did well to go that far but indirectly u did the same thing which i told u with setting the mca user to mqm,


Which is still not a good thing. Access directly or indirectly to mqm simply by estabilishing a connection is a serious security hole.
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exerk
PostPosted: Fri Sep 16, 2011 7:41 am    Post subject: Reply with quote

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Joined: 02 Nov 2006
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ankurlodhi wrote:
...u just need to push some more buttons.

You are certainly pushing some...
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bruce2359
PostPosted: Fri Sep 16, 2011 4:15 pm    Post subject: Reply with quote

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Location: US: west coast, almost. Otherwise, enroute.

Don't press the "put everyone in mqm group" button.
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