G/On Gateway Server Platform Windows Operating systems version Windows Server 2022, Windows Server 2019 or Windows Server 2016* Number of users Up to 2.000 per gateway, depending on application load Supported authentication server Active Directory, LDAP and local accounts * Even though G/On Server will install and run on Windows Server 2008, Windows Server 2008R2, Windows Server 2012, Windows Server 2012R2 these platforms are not anymore supported from G-On version 7.0 or above G/On Database (optional) Platform Microsoft SQL Server Operating systems version • Microsoft SQL Server 2012, 2014, 2016, 2017 and 2019, • Microsoft SQL Server Express 2012, 2014, 2016, 2017 and 2019 *G/On comes with a built-in SQL-lite database. It is possible to integrate G/On with an external SQL-database. This is mandatory for multiple G/On Gateway server installations G/On Client Platform Windows, macOS and Linux Operating systems version Windows 11 64-bit only Windows 10 64-bit only* macOS 10.15 Catalina, macOS 11 Big Sur or macOS 12 Monterey, both Intel and Apple silicon * G/On client also works on Windows 7 and Windows 8.1, however, these platforms are not supported anymore G/On Token Platform Windows, macOS and Linux Token types G/On MicroSmart token: USB Token with Smartcard for strong two-factor mutual authentication G/On Desktop token (ComputerUser token): stored in the user profile in Windows or macOS Soft token: stored on any USB-key of 2 GB and larger External authentication factors External authentication with authenticator app* Google Authenticator (OTP authentication) DUO Authenticator (OTP, SMS and push authentication) * G/On can be integrated with any other external authentication system using the RADIUS-protocol and if necessary by changing the plug-in based authentication architecture