Athena NGFW (Next-Generation Firewall)

Athena NGFW (previously known as Network Secure) provides comprehensive protection for every network perimeter, ensuring the safety of your valuable assets, data, and users from emerging threats.
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Athena NGFW (Next-Generation Firewall) {{ breadTitle }} User Manual Network Interfaces GRE Tunnel
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GRE Tunnel

{{ $t('productDocDetail.updateTime') }}: 2026-01-06

GRE tunnels support GRE over IP, GRE over OSPF, and GRE over IPSec VPN. Click Add to add a GRE tunnel, as shown in the following figure.

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Tunnel No.: The number of the new tunnel port.

Zone: The zone where the outbound interface resides.

IP Address: The IP address of the new tunnel. The network segment where the IP address resides serves as the OSPF running segment.

Type: Specify the tunnel type, which can be IPv4 or IPv6.

Source Address: The actual source address of the WAN route of the outbound interface at the local end.

Destination Address: The actual destination address of the WAN route of the incoming interface at the peer end.

GRE Key: A shared key, which must be consistent at both ends.

Advanced: You can set IPv4 MTU, IPv6 MTU, Message Checksum, and Send Keepalive Message.

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Click Save. The GRE tunnel is successfully set up.