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MS Remote Assist does not work to PC behind Nokia IP390 secured with Checkpoint.

Posted on 2007-12-03
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Last Modified: 2013-11-16
Hi, I am trying to use Remote Assistance on a group of Windows XP SP1 workstations which are now in a network behind a Nokia IP390 firewall.  This previously worked before the Nokia was implemented.

There is only one entry in the firewall rule base, *any *any *any accept.  This is because we are currently monitoring what traffic is flowing through this gateway.

When trying to remote assist a workstation I get this message "The remote server machine does not exist or is unavailable" and I get one checkpoint accept log entry for epmap followed immediately by a reject entry for epmap, with Attack information of "DCE-RPC Enforcement Violation UUID is not allowed through the Rule Base".

I have edited the Checkpoint Smart Center dcerpc.def and changed "define ALLOW_135 0" to "define ALLOW_135 1" and pushed the policies, but this issue still exists.

Does anyone have any ideas what I can try next?
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Question by:nowonmai666
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Expert Comment

by:grimkin
ID: 20407051
HIya,

Do you have SmartDefense running?
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Author Comment

by:nowonmai666
ID: 20409961
Hello

Smart defense has been disabled or set to monitor only where possible.

I found out that the Smart center is running R65 HFA02 but the Nokia IPSO was not.  HFA02 contains a fix where smart defense is still blocking traffic even though it is disabled.  I've patched both Nokia firewalls, just waiting for a suitable time to turn the rule base back on as they are currently only routing traffic.
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Accepted Solution

by:
nowonmai666 earned 0 total points
ID: 21011937
Fixed my problem.  Patched Nokia IPSO to 4.2-Build078,  Checkpoint NGX R65 HFA02.
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