Interesting paradox discovered - FreePBX 14 responsive voip "firewall" module is free GPL, yet it requires "incron" daemon rpm package (this watches changes to the file and directory inodes on the PBX server filesystem) and "system admin" module to be installed first, which requires "zend guard loader" which is used for running obfuscated php byte code ie protected code whose source is not open in order to hinder reading it and or reverse engineering it. For research purposes to see how much better these responsive firewall rules are in terms of how they allow for mid-call IP mobility, compared to the stock unresponsive firewall rules which prevent any mid-call IP mobility. 1. Has anyone here got a FreePBX 14 server up and running with incron, system admin module, and firewall module? 2. Can you get iptables to print to terminal its responsive firewall rules and share here?