The easiest way on how to check what Debian version you are running is to simply read a content of /etc/issue file. Example: root@debian:~# cat /etc/issue Debian GNU/Linux 9 \n \l However, the above command may not show the current Debian update point releases. Thus you may get more accurate…
How to setup call parking
What is call parking? Call parking is a means of placing a call on hold so anyone can retrieve the call if they know where the call is parked. The natural metaphor to describe how the feature operates is a car parking lot. In fact many of the call parking…
Installing FreePBX 15 with Asterisk 16 on Debian 9.6
Manual installations of FreePBX is considered an EXPERTS ONLY exercise. This method of installation is enough to get CORE functionality of FreePBX. Non-commercial modules may not function as expected or detailed in the Wiki’s. Certain modules and features may require additional software to be installed and configured on the server.…
IAX2 Security
Introduction Overview A change has been made to the IAX2 protocol to help mitigate denial of service attacks. This change is referred to as call token validation. This change affects how messages are exchanged and is not backwards compatible for an older client connecting to an updated server, so a…