How to generate online server??

[PROEMREPRO]

hello I want to generate new online server. Please help me!

[planetmaker]

Start OpenTTD and allow players to connect. Done.

If you have problems at a particular step, it really needs more information from you what exactly you tried on what platform, what worked, what doesn't - describing your actual problem. And please don't let that be "I was too lazy to actually read-up on any documentation nor search nor try anything"