Allowing SharePoint to go through proxy

Hi,

I have two questions:

1. I have existing SharePoint server where it already has access to internet directly within SharePoint.  I've been made assure that this server doesn't have direct internet access.  I have been looking at all web.config and I couldn't find any custom proxy setting.  Where can I find this setting as I want to replicate this to the new SharePoint environment.

2. I obviously want to set this up on the new SharePoint environment but am not confident that adding proxy setting into web.config will work.  Our proxy setting doesn't start with http anyway.  How do I make this work?

Thank you.