You can use this to protect any nodes or RPC Daemons from DDoS attacks. Using Nginx you can use proxy_pass to protect the Publicly available Port you give to people to use the node. That way Nginx ...

So any crypto currency node you run be it Monero XMR or Bitcoin BTC Ethereum ETH etc when you setup your node daemon you can choose to use a custom port change the default port to custom one that ...