Cisco ASA 5505 or Cisco ASA 5506 The company I work for currently uses Cisco ASA 5505 at our branch locations and will be opening a few more locations in the near future.Once in the firewall section, highlight 'NAT Rules'. Click on 'Configuration' at the top, then click on 'Firewall' down on the bottom menu. 2.) First, we need to ensure a NAT policy exists for a Public IP to NAT to the internal IP of the VoIP system / server.
