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amrameshreddy.blog.comIIS Hosting and ActivationThe Web has a default protocol, Hypertext Transport Protocol (HTTP), that runs on IP port 80using TCP as the transport and session layer protocol. 7 That’s the “default” port if not overriddenin requests. IIS by default listens on port 80 for non-SSL traffic.So, if you choose to host your WCF Services inside IIS, you need to ensure that port 80 isopen as required in the firewall. You simply do that by accessing the Windows Firewall settings.To access the Windows Firewall configuration wizard, access it through the Control Panel (Start➤ Control Panel ➤ Windows Firewall). At that point, you’ll see the Windows Firewall configuration.Ensure that the firewall is set to Off (not recommended unless troubleshooting) or, if set toOn, that the Don’t Allow Exceptions option is not checked.If the Don’t Allow Exceptions option is enabled, the firewall restrictions are absolute. Thepolicy for the Windows Firewall in this scenario is to not allow any unsolicited inbound requeststo any services hosted on this machine. So, for our needs, if you require any requests from off themachine to access services listening on this machine, you need to modify the Exception list.One quick but not recommended way is to completely turn off exceptions. We recommendthat option only when troubleshooting issues related to network communicationfailures and to confirm it’s the Windows Firewall that is the issue. The recommended approachis to disable the setting Don’t Allow Exceptions and edit the Programs and Services list.Now, with the Windows Firewall permitting exceptions, you can add the necessary portsto the Exception list. Next, click the Exceptions tab at the top of the Windows Firewall configurationwizard. Then click the Add Port button.We don’t use Add Program because that is designed for use only with client-type applicationsand not servers. Since we’ll be opening ports required for IIS, we just want to open thedefault port 80. So, after clicking Add Port, enter the details as shown in Figure C-5.Figure C-5. Adding port 80 ruleAPPENDIX C ■ WCF AND .NET FRAMEWORK INSTALLATION STEPS 453ramrameshreddyramrameshreddy7. For more information about the seven layers of the OSI model, see http://en.wikipedia.org/wiki/OSI_model.
amrameshreddy.blog.com454 APPENDIX C ■ WCF AND .NET FRAMEWORK INSTALLATION STEPSramrameshreddy.blog.comThe Name field is an arbitrary value that allows you to easily identify the rule name in theException list. We’ve chosen WWW for World Wide Web. The port number is the critical value.Since IIS uses port 80 over TCP as its default, we’ve used 80 and ensured TCP is selected as thetype of protocol. For now, you don’t need to modify the scope of the request because the rulewe’ve just entered will allow any computer to access port 80, which IIS is listening on.You’re now ready to host a WCF service inside IIS. Again, if you’re developing locally usingonly either IIS or the ASP.NET development server that comes with Visual Studio, you can skipthe Windows Firewall configuration changes. We want to stress the base comprehensionneeded for understanding how the network, specifically IP, works for troubleshooting andconfiguring WCF solutions.SummaryThis appendix detailed the installation process for WCF components and infrastructure. Youinvestigated initially how to install IIS. Then you went through the installation process ofVisual Studio 2005. (We used Visual Studio 2005 as our IDE for WCF applications.) Then youinvestigated the installation process for .NET 3.0 and Windows SDK to create an environmentto execute WCF-compliant code.ramrameshreddyramrameshreddy
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