I have one 2821 configured as a WebVPN gateway. The router is running IOS release 12.4(15)T5. Then i installed the AnyConnect VPN client release 2.2.0133 on a MAC OSX 10.4 machine. The issue is when i try to establish the connection with the gateway, it does not work. I'm able to see the messages "%SSLVPN-5-HTTP_REQUEST_NOT_AUTHORIZED" in the router console but i was not able to find the exact meaning of this.
I have this problem too.