We have 5 servers with a default "Request Security" IPSec policy enabled. It works reasonably well except it breaks Network Neighborhood. The servers do not appear in the list of machines when browsing from the client and from the server side when trying to explore the network, it states: "%Domain Name% is not available. You might not have permission to use this network resource." I know that an exception list can be built for enabling this but do not have time to build a complete test network to get it worked out. I was hoping someone had already done the leg work and can help me out.