how I can mask my game servers IP?

[worn bolt]

Pterodactyl has features to enable use of proxies, however we cannot provide support for proxies as it adds great complexity to the application set up. Troubleshooting complex network setups involving tunnels and proxies is extremely difficult to do without access to that network. Supporting complex network issues is outside the scope of this support.

[rain light]

As the bot says this adds a mass of complexity and may not work for all desired game servers

[graceful solar]

Also, just don't
Most game servers rely on unmasked IPs for good low latency connections