GRE
GRE Protocol
Detection Information
The following page provides information on the GRE 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.
Full Name
Generic Routing Encapsulation
Abbreviation
GRE
Introduced
Version 2.88
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.
Port Statistics
| IP Protocol | Flow Percent |
|---|---|
| GRE | 100% |
Category
VPN
External Resources
Protocol Detection
Do you know how much GRE traffic flows through your network? Netify's protocol detection engine and reporting provides insights to help manage your network.
What gets measured, gets managed.
Learn MoreNetify Resources
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