Hello. A google search, search of this site and review of Mac Leopard server documentation weren't helpful. I know little about servers and any advice is appreciated. I am involved in a collaboration between two universities. Users at each site connect to their own exchange server and other site-specific resources from behind the university firewall. However, we also want to share certain resources between sites, which currently isn't possible due to the firewalls. The total number of users is 20; about half use Macs. OUR GOAL: - shared secure access to files - access to shared calendar data so we can book meetings across sites from Outlook/iCal as we currently do within each site - shared Wiki access - ability to iChat between sites (currently blocked by one site) THE QUESTIONS: 1. Will a new machine running OSX 10.5 or 10.6 solve this problem by acting as a bridge between the two university networks? I envision that users would connect by VPN to the new server, which would in turn connect to the two exchange servers for calendar information. 2. The new machine could reside either on the public internet or behind one of the two firewalls. Would either be preferable? 3. I understand that a VPN connection to the iChat server would facilitate iChat connections across the firewalls as long as the relevant ports are not blocked within the university networks. Is this correct? Thanks for your consideration and apologies for the long post.