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#!/bin/bash
if [ ! "$#" -eq 1 ]
then
echo "Usage: ./set_gre_tunnel.sh [LB public IP address]"
exit
fi
LB_PUBLIC_IP=$1
LB_PRIVATE_IP=$(cat /opt/config/lb_private_ipaddr.txt)
MY_PRIVATE_IP=$(cat /opt/config/local_private_ipaddr.txt)
sed -i "s/x.x.x.x/"$LB_PUBLIC_IP"/g" /etc/bind/named.conf.options
ip tunnel add gre123 mode gre remote $LB_PRIVATE_IP local $MY_PRIVATE_IP ttl 255
ip link set gre123 up
ip addr add $LB_PUBLIC_IP"/32" dev gre123
route add default dev gre123
ifconfig eth0 down
service bind9 restart
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