I'm looking for a book recommendation or online guides. I'm familiar with simple soho networks and nat basics and that sort of thing. I'm interested in learning how to setup an ipsec vpn between my office pfsense and my home dd-wrt.
And stuff like 192.168.1.0/24 what the number after the slash means. I'm looking for whats next after the basics but I don't know what to call it.
http://pfsense.org/book explains that and lots more.