[CentOS] VPN suggestions centos 6, 7

On 4.4.2016 22.01, Eero Volotinen wrote:
> And openvpn. Avoid ipsec as it's too complex and pptp is unsecure.

This made me google around a little, and I found some good info here. 
They, too, kind of recommend openvpn.

http://www.howtogeek.com/211329/which-is-the-best-vpn-protocol-pptp-vs.-openvpn-vs.-l2tpipsec-vs.-sstp/

- Jussi