I just created a Nexus repo on a remote server. If I go to a browser on my local computer I see the pom file just fine. However, when I try mvn clean compile I see...
The problem is with your proxy settings. The current settings will cause all requests to localhost to go through the proxy which will not be able to connect with localhost and hence returns a 503.
To solve this issue add the following to the proxy settings in the settings.xml file:
localhost