Polycom V2IU 4350 - Manual (Page 61)

Configuring the V2IU 4350
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— Any: for the specified network, allows all ports and protocols through
the system. No ports are required because not all protocols support
the concept of ports.
• Port or Port Range: The port number or port range allowed through the
system when UDP or TCP are selected. A port range is specified by
separating the starting and ending ports with a colon ':' (for example,
22:80). The ports parameter is not supported when you select Any
protocol because not all protocols support the concept of ports.
4. When you have finished entering this information, click Add.
5. Click OK. The new forwarding entry appears on the Forwarding Rules
window in the list area.
Peering Proxy
H.323 prefixes can be used to route calls based on a matching prefix in the
destination alias of the call. Each prefix is associated with a domain name or IP
address to send the call to in case the prefix matches.
The prefixes are searched in order, that is, the first prefix is tried first, and then
the next one on the list until the system finds a matching prefix. This means
that if there are multiple matching prefixes, the first one is used.
How Peering Proxy Works
The Polycom V 2 IU 4350 supports the concept of an H.323 Peering Proxy. This
function provides advanced security layers or peering points within the
network where a security layer is needed. Peering Proxy allows network
providers to add internetworking connections between their “trusted”
network and an unknown network. This topology hides their trusted network
and the Stateful packet inspection Firewall provides the policies to ensure
security. You can add Peering Proxies in series with one another to push the
core H.323 networking infrastructure to meet individual security
requirements.
The illustration below shows a sample diagram with dial plan and call flow
examples. It is a snapshot of how the Peering Proxy can be deployed. Peering
Proxy however, is not limited to this specific scenario, so contact your Polycom
representative to discuss specific network requirements for full Peering Proxy
support.