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

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.

Known Ports

  • GRE - GRE tunneling protocol.

Category

VPN

External Resources

Related Protocols

A list of related protocols is below. List of all protocols.
Category Name

VPN

PPTP Details

VPN

OpenVPN Details

VPN

GPRS Tunneling Details

VPN

Cisco VPN Details

VPN

IP in IP Details

VPN

IPsec Details

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.

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Integration and Custom Solutions

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