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Microsoft® Lync Server 2010 Unleashed by Tom Pacyk, Andrew Abbate, Alex Lewis

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Considerations with Network Address Translation and Lync Server

If a single Edge Server is placed behind a firewall, it is acceptable to enable NAT. NAT effectively takes packets bound for the firewall and forwards them to hosts inside the firewall based on port rules. This enables a company with limited numbers of routable IP addresses to support multiple services with fewer IP addresses. It also provides a layer of security by requiring the firewall to process the packet first before it reaches the eventual destination. In addition, it enables protected systems to hide their IP information because they never appear to be a source of a packet to a system on the Internet; the firewall always appears to be the source.

Tip

If you enable NAT for ...

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