Securing a Minecraft server isn't complicated, but it does require paying attention to a set of details that many admins skip. These are the seven mistakes that come up again and again when servers get compromised or have persistent cheating problems.
1. Running Anti-Cheat with Default Settings
Plugins like Grim Anticheat ship with conservative defaults designed to avoid false positives on generic servers. These settings are not optimized for your server type, your player base's typical latency, or the specific cheats that target your game mode. Out-of-the-box anti-cheat is significantly less effective than a tuned configuration. Read the documentation, join the Discord, and spend a few hours on your config.
2. Giving Too Many Players Operator Status
Operator (op) permissions are often handed out too freely, especially on smaller servers where trust feels obvious. But an opd player can bypass most anti-cheat plugins, access commands that allow griefing, and in some configurations run commands with server-level impact. Limit op status to the absolute minimum, and use a permissions plugin like LuckPerms to give specific permissions to moderators rather than full op.
3. Never Reviewing Anti-Cheat Logs
Your anti-cheat plugin produces logs every time it flags a player. Most admins never look at them. Setting up a routine to review these logs - even briefly, a few times a week - surfaces patterns that real-time detection misses. A player accumulating dozens of low-confidence flags without a single high-confidence violation is often using subtle cheats that stay just below the detection threshold.
4. Using IP Bans as Primary Enforcement
IP bans are easy to evade and create collateral bans on legitimate players. UUID banning with alt detection is the correct approach for individual player bans. Reserve IP blocks for datacenter ranges sending bot traffic.
5. No Off-Site Backup of Ban Records
Ban records represent months of moderation work. Losing them - to a server crash, a compromised admin account, or a hosting failure - means previously banned players can rejoin with a clean slate. Keep ban records backed up off-site, or use a ban management solution that maintains its own external backup.
6. Treating Every Ban as Permanent
Not every rule violation deserves a permanent ban. Tiered consequences - warning, short ban, medium ban, permanent ban - are more proportionate and create a clearer path for players who made mistakes and want to come back. Permanent bans should be reserved for clear cheating, severe harassment, or repeated serious offenses after shorter bans failed to deter. Overuse of permanent bans breeds resentment and reduces the deterrent effect of the threat.
7. Isolating Your Ban List
Your ban list only covers players you've caught yourself. A cheater who has been banned from dozens of other servers arrives on yours with a clean record. Connecting to a shared ban network gives your server access to community-wide enforcement intelligence, so known bad actors get flagged on their first join rather than having to earn a ban all over again.