What is the safest way to make a minecraft server?

Lead shielding in a bomb proof bunker. What? A Minecraft server is not dangerous, what do you mean by "safe"? Safe from DDOS attacks? Have a server host that protects against DDOS attacks. Safe against erasure? Make backups. Safe from harm? Don't set your drink on your server. Safe from viruses? Don't download stuff you don't know what it is. Safe from bugs?