GateKeeper by Calyptix Security Corporation provides secure remote access via SSH or Microsoft RDP with two-factor authentication (2FA) for every network session. GateKeeper authenticates users with a name, password, and a One-Time Verification Code. It shields RDP or SSH ports and systems from the public Internet and unauthorized users, preventing exposure of these services. GateKeeper supports various protocols including RDP, SSH, HTTPS, VNC, and SFTP. It allows organizations to maintain control over network security while adapting to a 'work from home' culture.