What's the best VPN software to use with a linux server and linux/windows/android clients? I mainly use VPN to access blocked sites in the UK, bypass BT's crappy traffic filtering and connect to my home PC when out and about. I like OpenVPN AS and it's web GUI, but it has no support for IPv6 (I asked them in ticket) and is limited to 2 users without paying like $100 a year.
PPTP client on windows puts all my traffic through VPN, so I can't ping my home server on 192.168.2.100 on a different network card. SoftEther is also nice but the "vpncmd" utility fails to work on my server.