Handling Non-SIP Attacks With Kamailio

Recently, I posted about using Kamailio’s PIKE module to help block excessive SIP traffic. This is a great tool for helping your system handle high traffic SIP, such as floods. But, what can you do when someone sends garbage or non-SIP traffic to your system? Kamailio’s SIP parser is handled in the core and was recently upgraded in v5.5 with logging improvements, as well as simplified implementation, static map for header name, and type for parsing....

October 1, 2021 · 3 min · Fred Posner

Simple TLS Gateway

Well, 2020 is certainly a strange year… Some of us have been working from home for a very long time while others are now just understanding the benefits. Of course, when a drastic change in work environment becomes a forced change, the implementation can be quite daunting. Let’s look at telephony for example. Many small, medium, and even enterprise PBX deployments have been designed to only allow endpoints (aka phones) to connect from within the local network....

May 5, 2020 · 2 min · Fred Posner

Hi. My name is Fred, and I'm a Kamailian.

I got thrown into VoIP in a sink or swim situation — and thankfully, I’m a strong swimmer. I’ve talked previously about my love of phones. Growing up in New York City, my family would purposely avoid walking on certain blocks to avoid me seeing pay-phones. As a child, I loved phones. I still love phones. My love of phones made me what I am today. I am a Kamailian. ...

July 28, 2011 · 3 min · Fred Posner