input: [Category] Operations [Description] When using the WSHttpDualBidning for callbacks, WCF will use by default port 80 for the callbacks. This will likely conflict during development time with local installation of IIS, and is of little use in Intranet deployment. However, as The download shows, you can configure the client callback base address in the client-side config file to have a different port. [Last Updated] 9/7/2006 [Title] 
output: Dual HTTP Callback Address in config