In this thesis, we addressed emerging free to use VPN solutions. Lately there are quite some new offerings on VPN market, promising equal or better, performance, security and ease of use in comparison to conventional VPN solutions. We have focused on ZeroTier VPN solution, which works fundamentally different from conventional VPN. It uses SDN principles. Clients of ZeroTier network authenticate on a server, and then form a peer-to-peer network. For evaluation of VPN protocols we have designed a few tests, where we compared two emerging VPN solutions - ZeroTier and Wireguard, and two mature, established protocols - OpenVPN and IKEv2/IPSec. Results of testing have shown, that the most mature solution for industry is OpenVPN. WireGuard is a very efficient protocol with great potential.
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