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MQSeries.net Forum Index » IBM MQ Security » Does SSL Cert for MQ SDR/RCVR chnl relies on phy hostname?

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neutron
PostPosted: Tue Apr 17, 2012 7:31 pm    Post subject: Does SSL Cert for MQ SDR/RCVR chnl relies on phy hostname? Reply with quote

Novice

Joined: 25 Aug 2008
Posts: 21

Hi,

we are doing a physical machine change for our current QMgr. But the current QMGR contains SSL channel with external QMgr. We are retaining every info hence all QMID / QM data remains unchanged except that the machine that the QM will be residing on will be different.

SSL cert we are using is Entrust.

Regards
Dingshan
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fjb_saper
PostPosted: Tue Apr 17, 2012 8:15 pm    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY

The real question here is what is the value of the Common Name on the cert.
I sure hope it to be the qmgr name and not the hostname...

Moving to security forum

Have fun
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zpat
PostPosted: Tue Apr 17, 2012 11:56 pm    Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5866
Location: UK

The host name should not matter.

The common name won't change if you use the same certificates (or indeed the same keystore). Even then it's only used by the peer checking at the other end (which can be changed if needed). You can check whatever CN value you like (it's an arbitrary value). So even if it is the hostname, you don't have to change it.

The certificate label needs to be correct for the QM name. So the real question is - does the QM name change?
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fjb_saper
PostPosted: Wed Apr 18, 2012 4:58 am    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY

zpat wrote:
The host name should not matter.

The common name won't change if you use the same certificates (or indeed the same keystore). Even then it's only used by the peer checking at the other end (which can be changed if needed). You can check whatever CN value you like (it's an arbitrary value). So even if it is the hostname, you don't have to change it.

The certificate label needs to be correct for the QM name. So the real question is - does the QM name change?


I agree, except that if you look at https (web site certificates) where typically the CN is the website url and gets checked during the SSL authentication...

For MQ having the CN to be the qmgr name is a good idea. It allows you to differentiate between 2 qmgrs on the same box and ensures you change the cert if you change the qmgr name...

Have fun
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