I have a cisco 800 series router. I'm trying to connect to a server behind it, though a microsoft pptp client. But the router doesn't allow it. It gets to the registering computer on network stage after verifying user name and password then bugs out and says server could not allocate an IP address. I read on the net somewhere that pptp and the cisco router both use GRE or something, they apartently conflict or something. Is there an access list or something i can setup to allow protocol access for GRE.
Or another solution if this is complete crap?