We are having issues with students accessing the home and pages sections of courses when they use the canvas app externally. We proxy their web requests back into through the school when they are offsite. They use the same proxy when they are connected at school. the only difference is that the canvas app works when at school but not at home. I can access canvas using a browser. I thinking that the app is reference call with a different port then what it uses when connected through a browser. Is there list of the port call the ios app uses?