VPN solution needed (linux<->win32) or (nt<->win32)

[Mailing Lists <mlist () almerco ca>]

Hi.

I'm looking at implementing a VPN for my network.

Basically, I actually have a linux firewall (ip filtering + masquerading) 
connected over a cable modem line.

I want to access an internal server over untrusted networks (a friend's 
internet connection, the office or my own dialup account with another 
provider when I'm on the road).

First scenario (preferred):  what would be a free VPN solution using my 
existing linux fw?
Second: what would be a non-free using my linux?
third: what are the alternatives using NT as a FW?

I search and read on the subject, but would rather like to ear from 
personal experience on the field.

I already looked at Cybernetica's Secure Socket Agent (SSA) built over a 
SSL connection which is free for home and educational purposes but don't 
know about the technology is good or if any of you have a better solution 
or experience.

Thanks!