Network > GRE Tunnels

Create a GRE tunnel to encapsulate a payload protocol and connect two endpoints in a point-to-point, logical link.
Generic Routing Encapsulation (GRE) tunnel protocol is a carrier protocol that encapsulates a payload protocol. The GRE packet itself is encapsulated in a transport protocol (IPv4 or IPv6). The GRE tunnel connects two endpoints in a point-to-point, logical link between the firewall and a router (or another firewall). Palo Alto Networks firewalls support termination of a GRE tunnel.
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See:
Building blocks of a GRE tunnel
How to provide interoperability with another vendor’s tunnel endpoint
Select Add GRE Encapsulation when you create an IPSec tunnel.
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