If you were sent to this page, you are running:
- A cracked version of Minecraft
- A server that supports users of Minecraft cracks
- Or a server running in offline-mode for any given reason.
It is important to be aware that there is no such thing as a "premium" Minecraft account.
You either have an account (a validly registered and purchased Mojang account) or you don't.
If you do not have an account and are still playing Minecraft, you are running a cracked client.
Minecraft cracks are illegal software piracy.
Creating, downloading, using, possessing, or distributing a Minecraft crack is a crime.
You should never download, use, or distribute illegal software.
It is well known that most Minecraft cracks contain malware (which, in general, is common for most pirated software).
Your computer may be at risk or have been infected with malware if you install or have installed a Minecraft crack.
Cracked Servers Are Limited
An important limitation of both cracked clients and offline-mode servers is reduced and/or altered functionality.
Cracked clients and offline-mode servers cannot access some functionality of Minecraft that is available in legitimate installations.
As such, even if we chose to support offline-mode servers, we would be unable to.
Many errors and strange behaviors result from hosting an offline-mode server, and often do not appear on online-mode servers at all.
As a result, issues on offline-mode servers cannot be addressed in the same way we can address issues found on online-mode servers.
While generally plugins can run and will work for the most part, we cannot and will not give support for offline-mode servers in any issues pages, forum threads, chatrooms, or other support lines.
Consequences Of Offline-Mode
Be aware as well that having a server that was in offline mode even momentarily and then changed to online mode after can have lasting consequences, making it dangerous to do things like "just quickly change to offline to test something".
If you are running an offline mode server and are going to fix that, the best way to reduce risk of trouble here is to delete player data (stored in a folder labeled "playerdata" within each world).
General Risks of an Offline-Mode Server
Alongside to the technical support warnings, it should be noted that offline-mode servers are open to attacks that aren't possible on online-mode servers, such as fake player flooding attacks and banned users returning under a different username (sometimes with a different IP address as well).
Additionally, attacks that are possible on both offline and online mode serverrs, such as DDoS attacks, are more common on offline-mode servers(in part due to lower fear of consequences from angry players), and in some cases even more easily done (from the lack of official Minecraft safety systems like the account authenticator, as well as availability of things that simply don't work correctly in offline mode).
How To Do It Right
Your server should always be in online-mode (this is a setting within your
server.properties file, there should be a line that reads
The only case when offline-mode can be used on a server is when Bungee is in use. Bungee is a proxy that has its own online-mode functionality, which should be enabled, and your server should have all ports other than the Bungee port blocked by a firewall (otherwise the Bungee online-mode functionality can be bypassed and broken).