Specifications

MBG Engineering Guidelines, Release 8.0
Mitel Border Gateway as Internet Gateway
Mitel recommends deploying the Mitel Standard Linux server with Mitel Border Gateway as the Internet gateway
and firewall for any enterprise without an existing firewall. Figure 2 shows a example of this configuration using
the Mitel Border Gateway and a Mitel Communications Director (3300 ICP).
MBG requires two network interfaces and two addresses for this configuration. The external address must:
1. Be a static address that does not change
2. Be directly attached to a NIC on the MSL server
3. Be reachable from the public network/Internet
4. Be reachable from the internal network/LAN
5. Not be subject to NAT or behind another firewall
The interface may be configured via DHCP, PPPoA, PPPoE or similar technology, but the address it receives
must always be the same.
Warning: If the external address changes, all teleworker phones must be reprogrammed with the new
address.
3
Figure 1: MBG in traditional Teleworker configuration