Secure network connection over unsecure networks!

Hello!

Does anyone know of some sort of technology or solution I can use to enable me to use my MBP and join random wireless networks or a wired network in work. However all and any network traffic is encrypted and routed to my home connection and then out to the net, then all the way back.

Yes it would be slow I'm sure but it would mean I can do what I want when I'm out and not worry about packet sniffing and also, I could access all my AFP shares, iTunes libraries etc. Basically, my MBP would just think I'm at home.

Is there anything that can achieve this?

 

Can I create a VPN server at home then connect to it from anywhere on either port 80 or 443? Will all traffic (no matter what the destination port) be forwarded on and work correctly? And will everything be encrypted? For instance I know that HTTP headers can go in plain text but the content is encrypted, I'm looking for no traceability and nothing going out plain text.

Thanks for your help.