You can find this week’s video here . This week's video shows how to easily and quickly track down IPs and ports that need to be opened to allow legitimate traffic through the firewall. Part of being a web server administrator is keeping your firewalls
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Read the complete post at http://blogs.iis.net/owscott/archive/2011/10/28/resolving-blocked-ports-through-windows-firewall-week-40.aspx