Tcp level IP filtering?

[hrstoyanov]

I would like to implement dynamic filtering of remote IP addresses in a Helidon 4 web app. I would like this filtering to happen at low tcp/udp socket level, before any TLS or HTTP processing occurs (so that cpu cycles are not wasted on banned IP addresses). I would like to be able to dynamically add/ remove IP addresses from such a block list.

Is this possible with Helidon SE 4? If so - links?

[hrstoyanov]

I can reject clients in the web server returning response code 429, for example. But I would like to reject IP addresses more efficiently, at the lowest level possible