Secure Mobile Access (SMA) 100 Series appliances, formerly called SonicWALL Secure Remote Access (SRA), running 7.5 or higher.SonicWall Next-Generation Firewall appliances including the TZ, NSA, and SuperMassive running SonicOS 5.8.1.0 or higher.SonicWall Mobile Connect is a free app, but requires a concurrent user license on one of the following SonicWall solutions in order to function properly: The client provides anytime, anywhere access to critical applications such as email, virtual desktop sessions and other macOS applications. SonicWall Mobile Connect™ provides users full network-level access to corporate and academic resources over encrypted SSL VPN connections.
I can connect via Telnet and IBM 5250 emulation software to run the AS/400 programs we use without much problem.
Our company is heavily invested in a bunch of IBM iSeries AS/400's.