Best Practices for Edge Server Security
Lync Server 2010
Topic Last Modified: 2012-10-18
Create a new subnet just for the Microsoft Lync Server 2010 Edge Servers.
Enhance the security of the routing rules for access to that subnet (disable broadcast, multicast, and traffic to other perimeter network subnets).
Refrain from changing the service account under which edge services run.
Read and use the information in Protecting the Edge Server Against DoS and Password Brute-Force Attacks in Lync Server 2010 at http://go.microsoft.com/fwlink/p/?LinkID=214180.