18.0.7 - Coordinate exploits, illegal heads

• Prevent /tpa, /home teleportation coordinate exploit, by vanishing player right before teleporting.
• Prevent respawn coordinate exploit, by vanishing player right before spawning
• Patch illegal heads, will not remove normal skulls/heads. Only removes player/steve heads.
• Tried multithreading RemoveIllegalBlocksOnCHUNKLOAD, doesn't improve performance much in my testing, might improve for you.
• Increase default autocrafting recipe cooldown to 5 ticks. (Autocrafting, not manual, this has a lag exploit)
• Allow customizing autocrafting cooldown.
• Clean up enchantment reverting code.
• Refractor all variable names to the proper format

More customizations

• Allow customizing the kick message that override all other ones
• Allow tweaking the falling blocks per chunk limit
• Allow tweaking the xp bottle per chunk limit
• Remove FixWorldStatsCommandBug because you should be using my WorldStatsRewritten plugin instead.
• Add beacon per chunk limit
• Disable ExperimentalDupePatch2 by default due to a load of bugs.
• Add another check to the falling blocks prevention to hopefully prevent some lag.
• Clean up event registering (#16)

Three new lag exploits

• Limit falling blocks in a chunk, prevents any falling blocks from falling if there is more than 50 falling blocks in a chunk.
• Limit experience bottles, prevent having a shit ton of exp bottles in one chunk then loading it to kill the server
• Prevent projectiles such as xp bottles and snowballs from going through portals, this can cause a shit ton of lag especially if there is new chunks on the other end, this wont prevent mobs or items

More fixes for 1.16

• Added an option to disable 1.16 fish because they can spawn a ton at once and cause a shit ton of lag.
• Disable ExperimentalDupePatch2 in 1.16 because it causes a SHIT ton of mobs to spawn, and not despawn. https://i.imgur.com/f691cep.png
• Disable any chunk checking in 1.16 because it causes a shit ton of errors

Fix the config options on 1.16

• Fix the config options on 1.16

More minor changes, another experimental godmode patch

• Add a new experimental godmode/dupe patch, disabled by default, you can enable by setting ExperimentalDupePatch2 to true, this will prevent any entities from despawning within 500 blocks from a player.
• Set RemoveALLIllegalBlocksOnCHUNKLOAD, FillInBedrockFloor, FillInBedrockRoof to false if the server is not on 1.12.x, this is because these cause a shit ton of errors on newer versions. You can bypass this by setting OverideConfigChanges to true
• Disable PreventPortalTraps by default because this is part of the anarchy experience.
• Added AntiSpam messages per x time, default is 10 messages every 30 seconds or about 1 message every 3 seconds if spamming.
• Fix colors in reload command

Minor fixes

• Added an optimization guide to this repo, please follow it to patch some other exploits/lag.
• Add chat character limit
• Check if player is dead in the godmode patch, this is to prevent getting kicked after dying.
• Add slime block chunk limit (Karson)

Many changes, more exploits

• Add a better godmode patch, according to a 9b9t dev this should work for pretty much all godmode attempts. I'm not sure though, if you find any bypasses please tell me.
• Prevent high enchanted items like 32ks.
• Render distance limiter, disabled by default. The paper render distance changer causes lag for some reason, enable if you want.
• Add experimental dupe patch (https://youtu.be/q9-3-46YlE4) Apparently this fixes it according to James Rustles.
• Made the world checks work for people with renamed worlds. (I don't know why anyone does this)
• More configurable connection messages. (#11)
• Lever rate limit. Disabled by default because I don't think you need this. (#11)
• Add option to disable antispam. (#11)
• Add /aef lag to artificially lag your server to test something.
• Add option to remove all wither skulls every second, useful if you have a bunch of wither skulls stuck in one chunk. (You should disable withers along with this)
• Add /toggleconnectionmsgs.
• Prevent command signs.
• Include the word discord in the link antispam limiter.

Better boatfly patch

• Add a better boat fly patch, this checks the players packets to see if they send too many entity use packets. There are no longer any false positives!
• Remove strict boatfly patch mode as its no longer needed
• Remove chunk generation notification
• Change logpacketflyevents to false by default
• Moved all commands to the proper command event and only allow ops to run them.
• Add commands to README
• Allow any capitalization for the BannedWords
• Convert some things to ChatColor instead of § colors
• Remove playercommand and chunkcommand from config.yml as they can't be executed by players anymore.

Fix packetfly config bug

• Fix packetfly config bug, should now actually work.