APP: GRE Tunneling
This signature detects Generic Routing Encapsulation (GRE) tunnels. Such tunnels bypass normal firewall rules. The IDP still inspects the contents of GRE tunnels, but tunneling can be a violation of your site's network use policy.
References
URL: http://en.wikipedia.org/wiki/Generic_Routing_Encapsulation
mx-19.3
vmx-19.3
vsrx-19.2
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vmx-19.4
mx-19.4
srxevo-25.4
vsrx-26.2
srx-26.2
srx-branch-26.2
vsrx3bsd-26.2
mx-12.3
srx-12.3
srx-branch-12.3
vsrx-12.3