Hey Guys,
I am in Australia and just bought a new 7800NXL router. I upgraded to latest firmware which is 2.24b
I am having a problem with VPN passtrough however. When I connect to a Server 2008 box (which is behind the 7800NXL), the VPN connects briefly (and I can ping the server etc) but then after about 30 seconds, connection drops. I have tried connecting to the VPN from differnt remote sites but the same issue always occurs.
I have port forwaded TCP port 1723 to the Server's IP address. However my reserach suggests that it might be a GRE47 protocol issue. I went into the incoming IP filtering section to see if I could add in the GRE protocol but it is not listed like the older Billion 7300RA model. Someone on another site said that appartently the 7800NXL may have already allowed the GRE47 protocol fowarded by default and this is why it is not mentioned in the IP filtering section.
At the very least, can someone tell me how I can fully disable the firewall for incoming traffic so I can test this properly. I suspect it is in the IP filtering section but not 100 percent sure. I tried allowing all protocols by using a source of IP of 0.0.0.0 and Destination IP of Server's IP but it says the source IP of 0.0.0.0 is invalid.
Anyway, I really need help on this. VPN is crucial to business operaations.