RSA Key Sizes: 2048 or 4096 bits?

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Monitoring with Ganglia: an O'Reilly community book project

I recently had the opportunity to contribute to an O'Reilly community book project, developing the book Monitoring with Ganglia in collaboration with other members of the Ganglia team

The week that everything changed

Last Wednesday, I felt an urge to carefully write out a list of all the possible characteristics that would make communications technology genuinely free. I felt this was important for a number of reasons: for example, to follow up on my earlier claim that free software does not always provide free communications, it is necessary to be able to measure the shortcomings against a perfect (although possibly unachievable) benchmark.

Interrupt-free computing

On debian-devel, there has been a discussion about the security issues of "spontaneously" appearing popups demanding the root password to make immediate security updates.

There is a much more general issue related to this: computing without interruptions.

"Do as we say, not as we do"

The Gold Standard in Free Communications Technology

In a previous blog entry, I posed the question whether open source communications software is really free and came to the conclusion that additional principles need to be defined for free communications, above and beyond the normal expectations of free software.

Using reSIProcate to connect Asterisk with WebRTC

In my previous blog entry about how to get WebRTC going fast I looked at the basics of setting up a SIP proxy (also known as a SIP router) to accept connections from WebRTC clients. As in a traditional, non-WebRTC world, the SIP proxy simply facilitates calling between all the clients it knows. In practice, deployments usually want to add additional functionality in the form of a PBX with queues, voicemail, menus and conferencing.

VoIP federation: another milestone

Slashdot recently picked out Federated VoIP as one of the compelling features in the upcoming Fedora 19 (Schrodinger's Cat) release. The same capability was recently part of the Debian 7 (wheezy) release and it is in Ubuntu too.

Is open source communications software really free?

Does every communications technology based on open source and open standards enable free communications? Or is something more necessary?

The FSF's campaign for a Skype replacement gives some indication that existing free software solutions have shortcomings.