Welcome | Daniel Pocock

Recent blog entries

Firewalling IPv6

With my new ISP providing native IPv6 transit, enabling IPv6 in Debian is pretty trivial, just update /etc/networking/interfaces:

iface eth0 inet6 static
	pre-up modprobe ipv6
	address 2001:67c:1388::2
	netmask 64
	gateway 2001:67c:1388::1

if you have a Linux router, enable packet forwarding:

echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

and add AAAA records to DNS:

This blog has upgraded to XCP, IPv6 and Debian 7.0 (wheezy)

If you noticed I hadn't updated the blog for a few days, you may have already anticipated that I've been up to something.... and you would be right.

The virtualisation platform that powers this blog (and a lot more, including Lumicall and DruCall) has just been updated to Xen Cloud Platform (XCP) on Debian 7.0 (Wheezy, release candidate 1)

Monitoring JBoss/Wildfly, Tomcat and other application servers with JMXetric

NOTE: this page has been updated now there has been feedback about JBoss issues and improvements to integration with JBoss now make it significantly easier to integrate. It is no longer necessary to customize JBoss logger settings in the JVM command line in order to use JMXetric with JBoss if you use JMXetric 1.0.6 or later and set initialdelay to a suitable value.

Understanding the WebRTC architecture from a free software perspective

WebRTC is here, now.

Google launched Chrome 25 with built-in WebRTC support on Monday, 25 February. Within 24 hours, DruCall, an easy-to-use WebRTC module for Drupal was available Free as a shiny new GPL project.

While this technology offers a level of convenience for end-users that is unprecedented, just what is involved for the keen server administrator who wants to deploy this today?

Announcing DruCall, the WebRTC module for Drupal blogs, CMS and e-commerce sites

Building on my previous work to put convenient WebRTC solutions into the hands of the free software community, I've just created the DruCall WebRTC module for Drupal.

DruCall makes it easier than ever to put click-to-call functionality into virtually any Drupal powered web site, whether your run a personal blog or the United States Government (the White House really does use Drupal)

Checking authors.txt before migrating to github

Ensuring that contributors are correctly recognised for their work is a cornerstone of the free and open source software community. Here I present a convenient script to help.

When projects migrate to git (and usually Github these days), there is usually quite a lot of enthusiasm to get up and running and the authors.txt file is not looked at closely, or not at all.

US military may need Lumicall

In a remarkable report in Wired Magazine, it has been revealed that US stealth bombers have to communicate with their British allies using conventional radio. What that means in practice is that it would be child's play for the enemy to use basic techniques like triangulation to locate these otherwise invisible aircraft.

Automatically mirroring SVN repositories to git and github

Updated 21 February 2013: the scripts below have now been adapted to run conveniently from cron and mirror multiple repositories. You can find full scripts and documentation on github

There are a number of scripts around, including an earlier blog post of my own, for making a once-off conversion of an SVN repository to a Git repository.

dynalogin 1.0.0 released

dynalogin 1.0.0 has finally been released. It is available now from the dynalogin web site

Packages for Debian GNU/Linux are already in the experimental catalog. It will be made available in Debian unstable and backports as soon as the freeze is lifted for the wheezy release.

Adapting the Swisscom Piccolo (Motorola 7640-47) Router for bridging and other ISPs


The Piccolo is actually quite a powerful router. Unfortunately, Swisscom has crippled it, removing fundamental configuration options from the web management interface, and even worse, breaking some of the (undocumented) command line configuration options.

At a bare minimum, the router can be turned into a bridge/modem, enabling more powerful functionality to be implemented using a wifi router with OpenWRT or a similar solution.