For big and small Minecraft servers, hacking is a common problem.
- X-ray
- Using other people's accounts (only for cracked servers)
- Using hack clients
- Use anti-x-ray such as paper's anti-xray guide to set it up
- Install an anti-cheat, there are many options, so go explore, some good ones that Soapy7261 has used include
- Themis (Free), however mainly targets moved based hacks, not pvp hacks
- Vulcan (Paid), also has a hook for bungee to sync alerts and scores across your servers, has discord webhook connection options, detects most hacks other than what's listed that it does not check for in the description, and more, go check it out!
- Disable cracked (preferred)
- A login plugin, not recommended because some contain security issues, and offline mode has other issues linked here