A user connecting from Vista 64 with the Cisco AnyConnect client was getting a “The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.” error when trying to connect. No changes had been made to the concentrator configuration which is an asa5520 running 8.0(3).
Via ASDM, there was a syslog notification of “SVC Message: 17/ERROR: Unable to successfully verify all routing table modifications are correct.”
Also annoyingly, the license only supports 2 clientless ssl vpn connections and the ssl vpn client appears to use a clientless connection initally which fails to shut down then the ssl client fails to connect, which prevents future logins with not error on the client side due to the licensing.
I found this article which linked the proble to Adobe Photoshop. The user had installed the photoshop trial recently and when he disabled bonjour for windows, which was installed by photoshop, the VPN worked fine.
I installed Bonjour on XP 32bit and could not reproduce the problem. Perhaps it’s a Vista 64 issue. It’s a small enough of an edge case that I don’t think I’ll try to reproduce.
User says: “it had a really odd name #1_Service_name###. it was added when I installed Adobe”