DialWays is described as 'Dialways radius/AAA tacacs server grants security through dial-up, VPN and VoIP sessions' and is an app. There are three alternatives to DialWays for a variety of platforms, including Mac, Windows, Linux, Self-Hosted and Rust apps. The best DialWays alternative is Tacquito, which is both free and Open Source. Other great apps like DialWays are TACACS+ NG and ratchet TACACS+.
Tacquito provides an rfc8907 implementation of TACACS+. This package is primarily a module that implements the TACACS+ protocol and can be used to build TACACS+ servers and clients. We provide a reference implementation of a client and a server but you are encouraged to...
tac_plus-ng is a TACACS+ daemon that supports RADIUS, too. It provides networking components like routers and switches with authentication, authorisation and accounting services.
This is unstable and has not been broadly validated against available TACACS+ clients, please use with caution!