Long time no post, Basic questions about OS X server... hard to get detailed answers on Apple's website anymore. I work for a company with about 20 PCs and 1 mac (soon to be replacing PC workstations with Mac Minis, I hope), Windows 2003 server, and a wired network connected to the internet through a dedicated Sonicwall firewall device (also badly manages our VPN connections). The hardware firewall seems overkill, but our work is very sensitive. I'm making a proposal to upgrade to a Mac Pro server running Lion Server, it's a huge cost increase over a custom-built Windows server, but I'm saying it would eradicate the $2k we spend a year on support for the damn Windows server and Sonicwall. But in order to do that, I have to justify eliminating the Sonicwall entirely. The Mac Pro has 2 gigabit ethernet ports... surely I can connect the DSL to one and the wired network to the other? Does OS X Server have built-in network-wide firewall capabilities? With so many PCs, we can't have a patchwork of individual firewalls, the machines have to be physically separated from the open internet. Thanks!