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Do I need to enter port number in field Port?

This is an optional field.

you need to enter that port number in this field only when the resource listens to a port other than the protocol's default port.

For example, your Web server listen to the port 123456 which is different from the default port of 80, so you need enter 123456 in this field.

If a Mail To, Call To Skype phone, or Other is selected in field Protocol, you don't need to enter anything in field Port. The data entered in this field will be ignored by iHome for any of these selections.

Click on a question in the column Related Questions for detailed information regarding the fields on the resource form.