Default settings for APNS connection are the following:

But these settings don't work for connection through proxy.
The documentation on Afaria says this:

"Only if you are required to use a proxy for the Apple APNS
and feedback servers, click APNS/Feedback Configuration and
change the predefined settings to your proxy server.
• APNS domain and port for sending notifications.
• Feedback domain and port for soliciting feedback, as
defined by Apple."

It's not clear for me what exactly should be entered instead
of default settings in case of using proxy. Writing address
and port of proxy server didn't help. What hosts and ports
should I use?
Thank you for any help!