Private (Trusted) Networks - Inter-Tel AXXESS Manual

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Appendix F – Network Topology

without necessarily passing through a firewall/NAT. It essentially makes one larger private net-

work. A Virtual Private Network (VPN) uses public network facilities to provide private WAN

connections. In either implementation, there are no restrictions on topology as long as all IP

devices are on the same private network as shown below.

above, you may want to consider the following options:

MANUAL VERSION 11.0 – May 2008

A Wide Area Network (WAN) provides the ability to connect two or more networks

Note that IP endpoints and Inter-

Tel Private Networking will work

outside the firewall with near-end

NAT traversal.

To allow IP endpoints on the Internet in the private networking scenario described

Configure a static NAT assignment in the near-end NAT. Program the Axxess system to

know IPRC's NATed address along with which endpoints are connecting from the Inter-

net. See "Configuring Near-End NAT Traversal for IP Endpoints" on

Add an IPRC that connects outside the firewall (NAT). See "Using a Second IPRC to

"Straddle" the Firewall (NAT)" on

Provide VPN connectivity

IP endpoint.

Network an additional Axxess or Inter-Tel 5000 system using PRI networking, and

place it in a non-NATed DMZ as described below.

Although VPN links avoid the security and NAT addressing issues, the encryption of VPN traffic

sometimes introduces significant delays making it unsuitable for VoIP communications. This is a

function of the network connections and the networking equipment.

for more information.

between the private network and the network containing the

Private (Trusted) Networks

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