GRE Protocol
This page provides information on the GRE Protocol detected by the Netify DPI engine. GRE is a native IP protocol.
Protocol Description
GRE (General Routing Encapsulation) is a low-level tunneling protocol used by various VPN implementations: Cisco, IPsec, PPTP and more. The protocol can be used to transport IPv4, IPv6, multicast and other low-level protocols.
Please see the protocol catalog page for information on other protocols detected by Netify DPI.
Protocol Details
- ID
- 80
- Full Name
- Generic Routing Encapsulation
- Abbreviation
- GRE
- Category Tag
- vpn
- Category
- VPN
- Home Page
- GRE
- Introduced
- Version 2.88
Protocol Ports - Detected
- GRE 0
- Common
Best Practices
VPNs can not only be used to connect remote locations, but also be used to bypass your firewall/DNS policies. Investigate any unauthorized use on your network.
Related Protocols
Review the VPN category suite below, or explore the complete protocol catalog.