We have a strange issue using Anyconnect client ver3.1.08009 on Windows 7 to sslvpn to IOS router where after 2 months of no issue, it has started to constantly suffer from what seems like false captive portal detection. This appears to be irrespective of the device or IOS its connecting up to. There are workarounds within this forum etc.. however these are very clunky. Is this client supported by Cisco? Is there a fix?
