Just come across a nasty bug in version 8.4(6) that stops clientless VPN sessions from working.

Basically any session that needs to use extended plugins such as RDP won’t work following an upgrade – with a simple blank screen being displayed when clicking on the link.

Solution is to downgrade to 8.4(5) or upgrade to 9.1(2) or higher.

Cisco bug ID is CSCug23031

Barry Hesk
Intrinsic Network Solutions