Cisco router app
Configuring a Cisco Router with 3CX. On this topic. Introduction. Step 1: Configure Port Forwarding (NAT) Step 2: Configuring Firewall and ACLs. Step 3: Validating Your Setup. Introduction. This document describes the configuration of a Cisco Router for the use with 3CX Phone System. A Cisco router has a firewall (ACL’s) and also NAT.