Hey experts, i have three FusionPbx and all of these are hosted on different on Cloud Platform (Amazon, Linnode and Vultur) but am unable to register phone on any of these "Registration error 408 Request Timeout" any idea?? no firewall is enable i even tried fail2ban and restart but nothing is working. I can access Fusionpbx page but phones are unable to register
Run tcpdump on your FusionPBX. If you see the packets reaching the server but still not replying, chances are that you are just dropping the packets with iptables. Just for testing purposes, bring fail2ban and iptables down , check if you are able to register. If you are, bring one of those up at the time and then you will find the culprit.
If you are not getting the packets in the first place, check if you have enabled the provider (Amazon, etc) firewall, if you have, usually you need to whitelist the traffic you want to let go through.