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OMSA Update through a Firewall

Hi,

We've had multiple issues pushing updates through OMSA to Windows clients on the other side of a firewall.  As per the Dell guidance I have the following ports open between hosts (source being the OME server):..

Ports 161/162 - SNMP

Port 135 - RPC/WMI

Port 445 - SMB File share 

Port 1311 - OMSA HTTPS

However, we are unable to complete a successful update from the OME server to the Windows DMZ hosts when trying to push the updating using OMSA.  The binary image gets transferred, however the task that executes this will not work, we have checked credentials and they are fine.

Using the troubleshooting tool I can see we have the following error with DMZ based hosts:..

Image may be NSFW.
Clik here to view.

Security is one of our top priorities, so getting additional ports opened on the firewall if required is a last resort.

Is there any additional configuration required for pushing through a firewall?  Or any alternative method of OME executing the binary once it has been transferred to a Windows host?

Any help appreciated.


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