You did WHAT with iptables? (Part 4: The “Revert to old behavior” Solution)

I was conferring with my newest colleague, and explaining to him the hack job I had to do to make music on hold work. Apparently, his google-fu is better than mine, as he found this gem:

Turns out, they did put in a “revert to old behavior” option. It’s called “Duplex Streaming Enabled”.

Needless to say, that works much better than what I was doing.

We Got Reddited

So, someone on reddit thought it would be rather funny to post a link to this image on our server at work:


It was posted under the heading “NSFW” (Not Safe For Work). If you aren’t aware, that typically denotes a post to something inappropriate in nature. It’s work safety gear, so it’s […]

Raising Boys

You did WHAT with iptables? (Part 3: The Actual Solution)

If you didn’t guess by the title, this is Part 3 in a whole series about abusing iptables. It’d be wise to read Part 1, then Part 2, then come back here.

If you are looking for a copy/paste answer, you won’t find it. The actual solution is spattered throughout all three parts to tell […]

You did WHAT with iptables? (Part 2: The Almost Solution)

If you haven’t read Part 1: The Problem, I’d suggest you go do that first.

After discovering the actual problem, I started pouring over UCM documentation and options. Different combinations of options cause the SIP trunk to behave in different ways, but there doesn’t seem to be anything related to this mystical port 4000. Finally […]