Curious if this was ever resolved? I have the same issue where my laptop and Cisco anyconnect VPN works fine everywhere except in my home on Xfinity WIFI.
I am wondering if this was resolved, too, because I am having the same issue. I cannot connect to Cisco AnyConnect VPN using Xfinity. I can use other providers, cell phones but no Xfinity.
Interesting. We started encountering issues a month ago. Have Cisco Aironet 620 for one system and use Big IP software for another. Workign fine for 3+ years with Big IP and 1 year with the hardware VPN. I am also having other issues.