This is a list of the IP protocol numbers found in the field Protocol of the IPv4 header and the field Next Header of the IPv6 header.It is an identifier for the encapsulated protocol and determines the layout of the data that immediately follows the header.
Windows 10 PPTP VPN Oct 07, 2018 Nighthawk X6 R8000 GRE (protocol) forwarding - NETGEAR Any forwarding is limited to a single host on the LAN IP; when a protocol doesn't use ports it can't be split. The developers at netgear probably never read the RFC on GRE. They just figured a way to get PPTP to work by googling and finding that aside from port 1723 you need this misterious thing called protocol 47 microsoft must have invented.
Understanding Generic Routing Encapsulation on ACX Series, Configuring Generic Routing Encapsulation Tunneling on ACX Series, GRE Keepalive Time Overview, Configuring GRE Keepalive Time
GRE - Generic Routing Encapsulation a Cisco VPN for
GRE Protocol being blocked on network infrastructure is one of the most common issues faced when setting up a PPTP VPN Server. The first step is to stop the VPN Server. This is done by right clicking the VPN server in Routing and Remote Access and clicking "Stop" under All Tasks.
cannot pass PPTP via protocol 47 (GRE) through WRT We are trying to make VPN connections from a branch office through a WRT54GS router. The connections fail, as protocol 47 (GRE) is apparently not Port 1723 (tcp/udp) :: SpeedGuide Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly used port numbers for well-known internet services. Well Known Ports: 0 through 1023.