The topic of the final paper was the implementation of the IPsec (Internet Protocol Security) protocol in a Virtual Private Network (VPN) with the aim of establishing communication between three locations. IPsec was developed as a foundation for ensuring authentication, integrity, and reliability of communication, as well as protecting traffic at the third layer of the OSI network model transmitted between devices over potentially untrusted networks, such as the internet. Network and IPsec configuration were carried out using MikroTik equipment alongside computers and UTP cables. The project was conducted at the premises of the University Department for Professional Studies in Split in laboratory P08.