http://blogs.technet.com/kevinholman/archive/2009/06/02/some-server-2008-windows-firewall-rules-needed-to-install-opsmgr-r2.aspxI recently rebuilt a POC environment all on Server 2008, and SQL 2008. Out of the box – the R2 install is a bit rocky – because of the Windows Firewall enabled on Server 2008 by default.   These required custom firewall rules are documented on theen-USCommunityServer 2.1 SP1 (Build: 61025.2)