Specifications

Appendix B: Network IP Topology

Public (Untrusted) Networks

Mitel

5000 Installation Manual – Issue 3.0, October 2008 Page B-11

For the Mitel CS-5200/5400/5600 system and other IP devices to function properly in the DMZ,

the DMZ must be a non-NAT network. That is, the devices in the DMZ use public IP addresses.

The firewall can still provide some protection from the public Internet, but it does not translate

the IP addresses or port numbers. An example is shown in the following illustration.

Internet

LAN

Remote or home

office Firewall/NAT

LAN

Non-NAT DMZ

Inter-Tel 5x00

Public IP Address(es)

DB Programming,

OAI Apps,

Diagnostics Monitor,

System Monitor

Router/Firewall/NAT

Public

Interface

Private NAT

Interface

Non-NAT DMZ

Interface

UC/SIP Server

Enterprise

Conferencing

IP Endpoint