As Jefferson County Schools in Colorado have switched to Google Applications many local schools have some issues with accessing the various Google Applications from behind their firewall or from their location. Google released a document that outlines the various network changes that are necessary in order to allow Google Applications to work at your location.
Google Drive and Sites were designed to work on uninhibited networks. However, for domain and network administrators with specific firewalls and/or servers, the following sites must be accessible for Google Drive and Sites to function properly:
For the following, [N] means any single decimal digit. * means any string not containing a period.
Documents List, Documents, Presentations, and Drawings
http (port 80) connection to docs.google.com, docs[N].google.com and *.docs.google.com.
https (port 443) connection to docs.google.com and docs[N].google.com.
https (port 443) connection to *.docs.google.com.
Spreadsheets
http (port 80) connection to spreadsheet.google.com, spreadsheets.google.com, spreadsheets[N].google.com, and *.spreadsheets.google.com.
https (port 443) connection to spreadsheet.google.com, spreadsheets.google.com and spreadsheets[N].google.com.
Sites
http (port 80) connection to sites.google.com.
https (port 443) connection to sites.google.com.
https (port 443) connection to *.sites.google.com.
All Google Drive products
https (port 443) connection to ssl.gstatic.com.
https (port 443) connection to www.google.com.
https (port 443) connection to *.googleusercontent.com.
https (port 443) connection to gg.google.com.
https (port 443) connection to *.googleapis.com.
The IP addresses that the various domain names resolve to cannot be assumed to fall inside any given address range. IP addresses used by Google Drive may be used by other Google properties. The techniques that Google Drive uses to connect to Google servers depend on the browser, browser version, and networking conditions, among other things. Even if activity to some of the addresses above is not observed in a particular Google Drive product, that doesn’t mean it never will be.
This information was obtained by visiting
http://support.google.com/docs/bin/answer.py?hl=en&answer=1211661