Is it possible to set up a VPN server in Mac OS X 10.5 (not Mac OS X Server)? I've done this in Windows XP Professional and I'd like to have a VPN running on my Mac. I work out of my home, but when I am away, I'd like to be able to have access to my files here in the house.

You could always use AFP/Screen Sharing...

Like the user above me, I'm not answering your question directly but...

SSH
Turn on REMOTE-login which is SSH
With SSH you could acces your files 'encrypted like vpn...' or connect to your user/desktop

take 'openvpn'

Google 'iVPN'. Allows you to use the 'hidden' VPN server in Mac OS X 10.5 Client. Yes, the Client version does have the VPN server built-in, although there is no way to configure it without iVPN (no Server Preferences pane).

Hope this helps,
-CaptHowie.