En-Route

Sixxs Heartbeat Tunnel without Aiccu but Python (pfSense compatible)

For systems that do not provide Sixxs’ aiccu package to setup a GIF tunnel automatically, you can easily start the tunnel (not setup the routing 🙂 ) by executing the following script once per minute via cron:

#!/usr/local/bin/python2.7

import time,hashlib,subprocess,socket,os

localv6="2001:3880:fe20:121::2"
password="abcdef1234567890abcdef123456"
remotev4="98.76.54.123"
remotev6="2001:3880:fe20:121::1"

hbBase="HEARTBEAT TUNNEL " + localv6 + " sender " + str(int(time.time()))
hbToSend=hbBase + " " + hashlib.md5(hbBase + " " + password).hexdigest()
sock = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
sock.sendto(hbToSend, (remotev4, 3740))
sock.close()
with open(os.devnull, "w") as fnull:
  subprocess.call(["/sbin/ping6", "-s", "8", "-c", "1", remotev6], stdout=fnull, stderr=fnull)

This solution was first posted here:

UBNT – Sixxs Tunnel