Also change motd to something like: My Private Eaglercraft Server .
To make an Eaglercraft 1.12.2 server truly exclusive, you can implement a "Hardware-Attested Access Control" how to make a server in eaglercraft 112 2 exclusive
Because browsers cannot connect directly to standard Minecraft ports, you must use a proxy like with the EaglerXBungee plugin. Also change motd to something like: My Private