I am not trying stir up the hornet net or anything like that but simply want to say that certain VPN protocols are not as secure and therefore may compromise your chosen method without you knowing. Not to mention it a waste of your effort.
- PPTP can be cracked by government security agencies, i.e GCHQ (UK) or NSA (US). Microsoft actually recommended users not to use PPTP quite a while ago.
- L2TP/IPSec is also known to be compromised by same security agencies above. it is not 100% secure. This was revealed by Edward Snowden, the IT contractor of the NSA (US) and who was granted asylum in Russia.
For further detail see here: https://www.bestvpn.com/blog/4147/pptp- ... n-vs-sstp/
There is a summary at end of the article if you don't want to read the whole thing. It suggests OpenVPN or SSTP (note SSTP is only available in Windows environment).