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wiki/gre-on-freebsd.md
gollum 0fa2b91788 Created gre on freebsd (markdown)
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GRE on FreeBSD

This page describes how to configure GRE tunnels on FreeBSD.

Requirements

  • Root access to a FreeBSD system.
  • Loaded if_gre.ko or device gre
  • A static IPv4 address on both ends if you would like to preserve your sanity.

Create a temporary gre tunnel

ifconfig gre$INDEX create
ifconfig gre$INDEX tunnel $TUNNEL_SRC $TUNNEL_DST
ifconfig gre$INDEX inet $LOCAL $REMOTE netmask 0xffffffff
ifconfig gre$INDEX descr $DESCR

Create a persistent gre tunnel

Add this to your rc.conf. cloned_interfaces="$cloned_interfaces gre0" ifconfig_gre0="10.0.0.1 10.0.0.2 netmask 0xffffffff tunnel 1.2.3.4 5.6.7.8 descr foo"