Forum Discussion
Mehrdad1993
Feb 06, 2021Copper Contributor
Need help for RRAS VPN
Hello I created a RRAS VPN for my self on my laptop (win server 2019), my laptop is connected to the internet via Modem and i use a DDNS instead of static IP. i can connect to my home network w...
Dave Patrick
Feb 06, 2021MVP
The Generic Route Encapsulation (GRE) protocol is used in conjunction with PPTP. Data or payload that is going to pass through the tunnel is given a Point-to-Point Protocol (PPP) header and then placed inside a GRE packet. The GRE packet carries the data between the two tunnel endpoints. After the GRE packet has arrived at the final destination (the endpoint of the tunnel), it is discarded and the encapsulated packet is then transmitted to its final destination.
So I'd check that your NAT device allows TCP port 1723 and GRE (IP protocol 47)
- Mehrdad1993Feb 07, 2021Copper Contributor1723 and 47 are opened in port forwarding and NAT !