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Microsoft® Lync® Server 2013 Unleashed Second Edition by Randy Wintle, Alex Lewis, David Ross, Tom Pacyk

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Publicly Routable IP Addresses

One consideration when planning for Edge services is that each Lync Edge Server should use three separate publicly routable IP addresses: one for the Access Edge service, one for the Web Conferencing Edge service, and one for the A/V Edge service. All three of these services run on TCP 443, so Lync requires a separate IP address for each unique service. It is possible to run all three services on a single IP address and use non-default ports for some services, but this approach is not recommended.

A decision point for organizations is to determine whether they will assign publicly routable IP addresses directly to the Edge Server adapters, or whether Network Address Translation (NAT) will be used. The deciding factor ...

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