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AnyConnect 3.0.5075/3.1.00495

We are running an environment where our users are required to be connected to VPN through a 3G modem (mobile), come back to their home office, disconnect from the VPN and modem, then reconnect to our corporate network via lan.  Everything seems to go fine, until they open a web browser and attempt to go to internal or internet sites. When they do this, it seems that the browser connection causes some issues with windows communictions. All TCP traffic fails (does not leave the box), but UDP continues to work (ping, trace route, etc).  We have check routing, asa configs, anyconnect configs, modem configs, etc and find nothing that should be causing this.  It seems to be tied to IE 8 under either WinXP SP3 or Win 7. IE 7 on XP and IE9 on Win 7 don't seem to have the same issues.  The issue remains unitl the system is rebooted - stopping/starting services does not have any impact.

We have tried AC 3.0.575 and 3.1.00495, both with the same resluts.  Our endpoints are clustered ASA 5550s or 5520s (depends on environment) running 8.4(3).

I know this is bit of a strange environment, but has anyone ran into anything similiar? Found a solution?  We do have a case open with TAC, but thought I would post out here as well.

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