Unable to connect to the Mendix AppStore

I am unable to connect to the AppStore by our corporate network. If I use my internet at home i can connect with the same machine with no problem. I think this is due to our proxy server at work blocking access. I would like to know what ports and url i need our administrator to open in order for us to connect to the AppStore.
1 answers

mendix.com:443 and mendix.com:80