User`s guide

Allworx Server Administrator’s Guide Version 7.6
1-866-ALLWORX * 585-421-3850 Page 29
www.allworx.com
Revised: 11/22/13
5.4 Network Mode: NAT/Firewall
When the network mode is set to NAT/Firewall, the logical network capability is shown in
the diagram below:
For security purposes, the mode default settings enable only outbound connections
(from the LAN to the WAN); all WAN-initiated connections are denied. In addition, all
packets are subject to network address translation (NAT). Because of this, the
addresses of devices on the LAN are not visible on the WAN, but the WAN is accessible
outbound traffic. These features reduce the ability of WAN hosts to attack LAN hosts.
Expose the specific LAN sports to enable WAN access to specific LAN network services
through the firewall. To configure, navigate to Network > Configuration > Modify and
locate the Firewall section.