How to Secure Your Asterisk Server. A walk-through using iptables (and commands)
You have an Asterisk server and it probably isn’t secured properly. Here is how to do it using iptables. These commands don’t address SIP rtp ports, because we don’t need to worry about them. RTP traffic is dependent on SIP signaling to make it work. If we can’t get the SIP signaling messages, asterisk doesn’t(…)