Tuesday 5 February 2013

Email Sky Router Public IP Address with Gmail in Python

As far as I know, Sky Broadband don't offer a static IP address. You're going to want a way of keeping track of your externally available dynamic IP, so you can access your machine from outside of your network.

The python script below scrapes your Sky router's status page for your current IP and emails it your Gmail account.

Remember to change the Gmail username and password variables from '????????' to your Gmail authentication credentials. Run this script periodically as a cron job, and as long as you have Gmail access you'll know your IP.


import smtplib
from email.mime.text import MIMEText
import urllib2
import re

# router login page
router_login = ""
# router status url
router_status = ""
# router logout page
router_logout = ""
# default sky router username and password
router_username = "admin"
router_password = "sky"
# gmail email address
email = "????????@gmail.com"
# gmail password
email_password = "????????"
# gmail smtp settings
server = "smtp.gmail.com"
port = 587
# email subject
subject = "Server IP"

# login to router
passman = urllib2.HTTPPasswordMgrWithDefaultRealm()
passman.add_password(None, router_login, router_username, router_password)
authhandler = urllib2.HTTPBasicAuthHandler(passman)
opener = urllib2.build_opener(authhandler)

# get the first ip on the status page
ip = urllib2.urlopen(router_status).read()
ip = re.findall(r"[0-9]+(?:\.[0-9]+){3}", ip)
ip = ip[0]

# logout of router

# check for last ip address
f = open(".last_ip", "a+")
f.seek(0, 0)
last_ip = f.readline()

# has ip changed
if ip != last_ip:

  # store the new ip

  session = smtplib.SMTP(server, port)

  session.login(email, email_password)

  body = "http://" + ip

  msg = MIMEText(body)
  msg['Subject'] = subject
  msg['From'] = email
  msg['To'] = email

  session.sendmail(email, email, msg.as_string())