We have one Asterisk PBX (PIAF/FreePBX) installed on a server with two NIC. 1:st NIC is connected to a LAN and 2:nd NIC is connected to Internet with a public/static ip address (no external firewall). Phones are all connected from LAN and the trunks through internet.
Need to be done
Configure iptables so Asterisk can be connected with the trunks and phones connected to Asterisk. Web and SSH accessible from LAN and from one IP-range on Internet.