This is a maintenance script to ensure that your Hurricane Electric Tunnel Broker IPv6 tunnel is always listening for connections from your current external IPv4 address.
This script is helpful if you have a dynamic IP address from your ISP. The script is also logical and does not needlessly update the IPv6 address via Hurricane Electric's Tunnel Broker API. I've provided an explanation on how the script works here:
Please note: This was written and tested with Debian Squeeze (6.0), but it may work on other Debian-derived distributions. It was also written with the assumption that your tunnel is configured in a similar fashion as the way it is explained in my blog post:
To get this script up and running you will need to install some modules from the Comprehensive Perl Archive Network (CPAN):
If you have App::cpanminus (cpanm) installed you can install the needed modules with this command:
cpanm Logger::Syslog YAML::Tiny LWP::Protocol::https WWW::Mechanize
At this point you only need to download the script and schedule it to run with cron.
- Download the script and save it to /usr/local/sbin/he-ipv4.pl using either curl or wget:
curl -o /usr/local/sbin/he-ipv4.pl "https://raw.github.com/theckman/he-ipv4-perl/master/he-ipv4.pl"wget -O /usr/local/sbin/he-ipv4.pl "https://raw.github.com/theckman/he-ipv4-perl/master/he-ipv4.pl"
- Make the file executable:
chmod +x /usr/local/sbin/he-ipv4.pl
- Edit the file using your preferred text editor. Make sure all configuration items are set properly.
- Edit the root user's crontab (
crontab -e) to run this script post reboots and every 15 minutes:
@reboot /usr/sbin/he-ipv4.pl >/dev/null 2>&1
*/15 * * * * /usr/sbin/he-ipv4.pl >/dev/null 2>&1
The configuration is all done within the script file itself. There is a configuration section near the top of the file.
- $userID: this is your UserID value from the Main Page of HE's Tunnel Broker
- $userPass: an MD5 hash of your Tunnel Broker password:
echo -n YourPassword | md5sum- $tunnelID: the unique tunnel ID number from your tunnel's information page
- $tunnelName: this is the local name for the Tunnel Broker interface. In my blog I use the name "he-ipv6"
- @listURL: this is a list of the URLs that will be used to obtain the external IP address. This should not, in most cases, need to be touched
#License Copyright (c) 2011-2012 Tim Heckman and contributors
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