Web Deployment through Internet

i am going to publsih a web through internet

Information: Service URL: http://web123.com

Site/application: web123.com

but there are some errors that i cannot fix it.

Error 1 Web deployment task failed.(Could not complete the request to remote agent URL 'http://ift.tt/1EfZlQ6'.) Could not complete the request to remote agent URL The remote name could not be resolved: 'web123.com' 0 0 FYP