Windows SBS Ports

SBS Server requires the following ports to be opened on your router.

25 SMTP

443 HTTPS

80 HTTP (not a necessity)

987 SharePoint

For more information please visit the TechNet link below and look at the section titled “Internal Gateway (Firewall)

http://social.technet.microsoft.com/wiki/contents/articles/small-business-server-2011-standard-build-document-i-overview-of-sbs-2011.aspx