Encryption?

So i heard about encryption today, proxy players cant join if theres encryption? does anyone know hows that possible? how to implement it?

 

is it a feature in pmmp?

 

Do you want prevent proxy players?

 

yes

 

PHP:

public function onClientPacket(DataPacketReceiveEvent $event) {
        $ipList = [Server::getInstance()->getIp(), Internet::getIP(), "127.0.0.1", "localhost", "0.0.0.0"];
        $packet = $event->getPacket();
        $player = $event->getPlayer();
        if($packet instanceof LoginPacket){
            if(!in_array($packet->serverAddress, $ipList)){
                $player->kick("Proxy detected.");
                $event->setCancelled();
            }
        }
    }

 

Can you try this?

 

Will this only work if we know whay ip they're coming from?