Outlook RPC over HTTP causes ASA5510 to shun connection

Posted on 2011-03-10
Last Modified: 2012-05-11
We are experincing a peculiar issue with our ASA5510. It acts like it is shunning a remote connection when attampting to make an RPC via HTTP request from an Outlook client. If VPN is connected and we access Outlook Anywhere via LAN address we have no issues.

What leads us to believe we are being shunned is the inability to connect to VPN while outlook is open and attempting its remote connection. If outlook is closed then we can immedietly we can make a VPN connection.

We have disabled threat detection on our ASA in an attempt to pin point this issue. But even when it is enabled the shun does not appear when querying the ASA for shunned hosts.
Question by:hbrumfield
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LVL 26

Expert Comment

ID: 35108890
Note sure if there is anything called IRULE on this device...

Related links:

SOL7869: The BIG-IP ASM does not support connections using Remote Procedure Call over HTTP 

Author Comment

ID: 35111730
This links appear to be specific to f5 gear, are you asking if the cisco asa has an irule policy?
LVL 26

Expert Comment

ID: 35131282
the main picture is to create\configure the sticky session on the cisco device.

Accepted Solution

hbrumfield earned 0 total points
ID: 36241404
We determined this to be an issue with our Barracuda web filter sitting in path to the firewall. A firmware update from Barracuda resolved.

Author Closing Comment

ID: 36268210
Discovered solution by removing web filter from in path and testing.

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