What's the point of asking this question? Are you curious, or are you planning something? Every casino has its system to track cheaters and those using VPN. There is no specific name for the tools, but they're integrated as an add-on or a plugin. They secure the platform from cheaters; without them, the gambling platform will be exposed to cheaters and exploiters.

I don't think anyone will come here and expose the system because there's always a security patch. The casinos should protect their platform to continue serving their users.