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EtherTunnel #

EtherTunnel is the successor of the Inlab RBridge. The former name was too often confused with the IETF TRILL Routing Bridge, so this relaunch is a good opportunity to address this.

Features at a Glance #

EtherTunnel connects Ethernet LANs transparently through an UDP tunnel with the following features and properties:

  • The participating machines and devices are not aware of the tunneling.

  • The standard/common Ethernet MTU of 1500 remains as it is on all devices.

  • No router or device configuration changes required.

  • Very efficient custom packet fragmentation/reassembly outperforming the generalized kernel IP/UDP fragmentation and reassembly.

  • Authentication and encryption with ChaCha20-HMAC-SHA256 at several security levels.

  • Allow/deny filters for MAC-addresses, OUIs and Ethertypes.

  • Transport of multiple LANs/VLANs through one single tunnel.

  • A registry mechanism allows NAT traversal (“UDP hole punching”) at four security levels.

  • Native Linux distribution packages available for leading Linux distributions.

An EtherTunnel Endpoint on Debian 12 in 90 Seconds #

This shows the installation and setup of a H0E0 tunnel endpoint on Debian 12 (default authentication, no encryption). The other side is already running. As soon as the tunnel is established and the tunnel parameters appear in green, both Ethernets are transparently connected as if a cable had been plugged.

 

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