I need a fully working, self-hosted screen-sharing solution that lets multiple users log in at the same time and open several concurrent sessions each. I am open to any reliable open-source stack—RustDesk, MeshCentral, Apache Guacamole, or another project you recommend—as long as it supports stable connections from Windows, macOS, iOS and Android devices. Here is what I am after: • Deploy the chosen open-source software on my VPS (Ubuntu 22.04 LTS already provisioned). • Configure user management so I can create, edit and disable accounts, with limits on how many live screens each user can open concurrently. • Secure the instance (SSL/TLS, strong admin password, firewall rules). • Brand the login page with my logo and colours if the platform allows basic theming. • Provide a short PDF or markdown guide covering routine admin tasks and client setup links for Windows, macOS, iOS and Android. Acceptance criteria 1. At least two test accounts can sign in simultaneously and open separate remote sessions without noticeable lag. 2. All four client platforms connect successfully using their native or bundled viewer. 3. HTTPS certificate passes a basic SSL test. 4. Documentation is clear enough for me to add new users or update the server in the future. Once everything is running smoothly I will verify the points above on my side, then release payment. PLEASE NOTE: YOUR BIDDING PRICE WILL BE CONSIDERED YOUR FINAL PRICE. NO NEGOTIATIONS WILL BE ENTERTAINED AFTER YOU BID.