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ShoreTel & Cisco AnyConnect VPN issue

Posted on 2011-02-23
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Last Modified: 2012-05-11
We have Shoretel Communicator 11.1 installed on all our Main Office workstations.  Everything works fine, until we take our laptop and try to work from offsite.

After we log in via Cisco AnyConnect VPN and as soon as we launch Outlook, as a default, it automatically launches Agent.exe, CSISCMGR.exe. Even though I have closed the ShoreTel client.

At this point, I'm unable to access our internal network. I can't even ping our DNS server. It's as if all our connections drop as soon as we launch ShoreTel.

Only way around right now is to completely uninstall the ShoreTel Communicator. Only then the VPN will work.  Anyone else have similar issues?
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Question by:halo26us
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Expert Comment

by:asavener
ID: 36142869
Does the Shoretel communicator install an Outlook add-in?

I'd suggest checking if there is one, and whether it can be disabled.
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Accepted Solution

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halo26us earned 0 total points
ID: 36256636
It had to do with our firewall blocking HTTP.Null.Session and HTTP.Request.Smuggling
Somehow Shoretel Client over VPN generates unusual amount of HTTP handshake and triggered our IPS sensor
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Author Closing Comment

by:halo26us
ID: 36283932
Figure it out on my own
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