This script searches Shodan for Minecraft server IPs to grief. This will return all servers connected to the public internet which Shodan has indexed, regardless of whether or not they have been advertised anywhere. First you need a Shodan API key.
Edit config. At minimum, you must enter your API key. However, be aware that only you, and no one else, are responsible for any illegal activities you may partake in based on these IP lists.
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Some may even use a hack called "Crystal Aura" to make this attack even more deadly. The most effective way of preventing this is to disable PvP in the spawn area with Bukkit plugins and provide multiple exits for newly spawned players to escape from a single exit point is very predictable.
You can use the following commands, either in a repeating command block or a function, to give a player invincibility and teleport them to a random location away from spawn.
You will want to use a chain command block with this if not using functions. Note that players could abuse this by intentionally traveling to spawn to gain invincibility, which is why the invincibility command is shown with a smaller radius. For a long time, block logging plugins did not have the ability to roll back the growth of trees. Because of this, griefers would place saplings and use bonemeal if available to grow full trees in the locations where houses once stood, preventing rollbacks from easily undoing their damage.
They would also place lots of TNT on a tree and firebomb it if it has enough leaves to create devastating explosions. Previously, server admins would restrict the use of saplings and bonemeal with Bukkit permissions; however, that lead to problems for normal players. If you aren't using plugins, then you don't need to worry about this as good old fashioned backups are not affected by trees.
Many builders use a lot of flammable materials, and if the server has fire spread enabled, a griefer armed with flint and steel can quickly cause a lot of damage. Disable fire spread with world protection plugins if you have chosen to use Bukkit.
Alternatively, use a combination of the following commands , either in a repeating command block or a function. Social engineering is any technique used as an attempt to gain the trust of people by acting as a normal player or creating a situation where the legitimate players need to trust them. Be very careful who gets administrator tools and make sure that you know them well enough to trust them with power. If the griefer deops all of your operators, you can use the server console to deop them and reinstate control.
Trolls like to annoy players, rather than outright grief them. Most of these cannot be blocked, though they are usually easy to notice. A troll usually wants you to see what they have done, so they can annoy you more. A good temporary ban will solve things. A lot of trollers will stop after a firm warning, for example, "Stop trolling or I will ban you.
Usually, you only need to ban the person for a day or two. A relatively rare form of griefing, map corrupting is simply making the map file as big as possible, usually by running as far as they can and sometimes dominating the world with destructive mobs.
This can lead to a lot of lag in the server, and can make the map size so big that it cannot be loaded. If a backup is not available, then the map may need to be deleted and all structures will be lost. This was a big issue before the Beta switch to a new chunk managing method. Also a rare form of griefing, but quite destructive. How it works is the griefer uses a modded client to automatically write a large amount of information, either as NBT data or more commonly in Books and Quills using large Unicode letters, or on signs and placing the overloaded signs repeatedly in the same chunk.
Some plugins have a way to relieve the overloading by setting the data limit much higher than the vanilla data limit, however, loading the overloaded chunk would as expected still lag the server by quite a bit, and it's recommended for an operator to delete the overloaded chunk ASAP. If you're traveling and get stuck near an overloaded chunk, try lowering the draw distance to 2 chunks.
Most servers have a chunk render distance, so lowering your client render distance can sometimes mean you won't load the overloaded chunk at all. Combat logging is mostly a problem on PvP servers. Combat logging is when you're in combat with someone and they log off while you're fighting them. It does not inflict harm, but like trolling, just annoys people and causes frustration.
Sometimes PvP logging is the sign of a desperate player trying to stay alive or a connection error, though. Some Bukkit plugins can "tag" people when they get hit whilst in combat, which will create a penalty if they log out. It is possible to set up a detection system that uses the scoreboard to check the amount of health of the players before they leave.
However, this is very complicated and would be hard to set up. Item drops, redstone , armor stands , lingering potions , fireworks , splash potions , minecarts and boats have a long history of causing strain on servers and clients.
A griefer may attempt to lag out a certain area of the map by placing a lot of the aforementioned items into a small area or build "lag machines" with no purpose beyond generating lag, forcing both server and client to handle a lot of different things at once.
This form of griefing is especially prevalent in creative servers, where obtaining these lag-inducing items is incredibly easy. If you are using Bukkit, you can limit creation placement of certain blocks that have a tendency to cause lag, and research plugins that will remove item drops on a regular basis. A socialized form of griefing, where multiple people grief and then blame it on one of their alternate accounts to evade punishment.
This screen of deception can get alternate accounts or even innocent players banned while letting the real griefers continue their rampage. This form of griefing is becoming more popular with the rise of 'cracked' servers and the ability to create many alternate accounts.
To prevent this, watch very closely if the stories of the suspected griefer and the blamer match. In this documentation, you'll learn everything about how to exploit, discover and grief Minecraft networks, and how it all works in details.
I've decided to write this documentation with a full explanation on how to do it, because I've seen a lot of script kiddies selling their "private" methods, where in reality, they're not private at all, nor their own methods. There are other ways to gain access to a server. These methods are more advanced and requires knowledge in hacking and exploitation, and will therefore not be added to this documentation, as this documentation is aimed at Minecraft servers only.
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