Vyatta / VyOS / EdgeOS script for setting tunnel remote-ip based on a given hostname.

tun-remote-ip.sh

#!/bin/vbash
# sets the tunnel remote-ip based on the supplied host-name.

if [ $# == 0 ]; then 
  echo "usage: $0 <tunnel> <host-name>"
  echo " e.g.: $0 tun0 vpn-01.no-ip.com"
  exit 1
fi

tunnel=$1
hostname=$2


source /opt/vyatta/etc/functions/script-template

old_remote_ip=$(cli-shell-api showCfg interfaces tunnel $tunnel remote-ip | cut -d ' ' -f 2)
new_remote_ip=$(host $hostname | tail -1 | cut -d ' ' -f 4)


if [ "$new_remote_ip" != "$old_remote_ip" ]; then 
    configure
    set interfaces tunnel $tunnel remote-ip $new_remote_ip
    commit
    save
    exit
fi