VPN Passthrough

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http://serverfault.com – I have VPN passthrough open on my Cisco WRVS4400N router with port range forwarding open on port 1723 to my Windows 2003 server running as a VPN server. It has been working fine until this past Monday. It stopped working all together. Our FTP was not working either, so I did a quick router reboot. When it came back up it lost all the settings and went back to factory defaults. I reconfigured the router with all the same settings I had previously. FTP is working fine, but my VPN is giving me and error saying GRE is not open on the router. Event 20209 on my server. I have tried opening G (HowTos)