May 2014

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My company, Talia, provides hosted Voice-over-IP (VoIP) services to our customers. A typical use is a software-based PBX such as Asterisk on our virtual machine hosting cluster (or as the kids say, our “cloud”). We use the same for our own corporate PBX.

In the past month, we’ve experienced two fraudulent attacks costing a few hundred USD each. We have measures to detect and prevent such things, but that’s not what I want to talk about. I want to talk about how these attacks occurred.

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I still use a Buffalo WZR-HP-G300NH as my home router, although I no longer use it as a wireless AP*. Tonight I upgraded it to OpenWRT 12.09 “Attitude Adjustment”. These are my notes on the upgrade.

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