I purchased a Cisco SPA525G to use with my FreePBX 2.10.1.2 Dist. I can connect fine on my local network but the goal is to connect via the phone’s built in VPN from outside my network.
My router is a dd-wrt configured ASUS router with a PPTP Server. The phone isn’t able to connect to the VPN using the CHAP-Secrets from the router. I get an error “Failed to obtain WebVPN cookie”.
Basically your problem is that the Cisco SPA5XX phones built-in VPN client is designed solely for use with Cisco’s UC500 platform… so you can’t use it with a standard PPTP or IPSEC endpoint.