I have a WRVS4400N, which for the most part performs fine except for this. I have a PPTP VPN connection setup on my home computer and laptop to our office. Its the simple MS VPN to an ISA server back in the office.
When i try to connect via the VPN from behind the router, it never connects, simply times out. I have tried disabling the firewall, Block WAN requests, everything that i can find to disable, and still no joy.
If i remove the WRVS4400N router and connect directly to the internet, i connect just fine, so its definately the Cisco WRVS4400N causing the issues. Everything i read tells me it is some how blocking GRE, yet i am not sure how even with the firewall disabled.
Cisco, can you help?