What I do is on my domain name at Godaddy, i forward the domain name to my ip address plus port number. ie:
www.skipsdomain.com is forwarded to 123.45.678.123:88 The user doesn't have to type the port number, but it will appear in the browser address window along with the numeric address.
Not sure if that is what you wanted or if you want the port number to be completely hidden.
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