This is what F5 provided but some users tried it w/o success.
Unfortunately It is a false positive only by Symantec and is not a Firepass issue. The connection failure, and possible error message of "unable to connect to proxy server" occurs because the file "tunnelserver.exe" is being quarantined by all Symantec products.
Symantec has released an updated definitions file are available that will resolve the false positive issue
with tunnelserver.exe on the Firepass. This will be released into the normal update channel, but if you need this update
immediately you can obtain it from the link below.
To install, run the respective file on each client to update the definitions.
This should restore functionality. If the file was quarantined, be sure to release it from the quarantine. On Symantec it is located in the control panels. Symantec Control Panel>View Quarantine, select the file TunnelServer.exe, and then click Restore.