50 replies

packet server crasher?

hey, so for the past 2-3 days we've been having issues with some 13yo who keeps making our server unplayable and idk how to deal with it

basically when he joins everybodys ping jumps to values like 5000-15000 and the tps drops to as low as 0.7 (lol)

i dont think hes ddosing the server, since i'm running two servers on the same machine and while the first one lags the second one stays unbothered

im running purpur 1.19.4 build 1985 (latest one for 1.19.4)

the logs are spammed with something like this:

! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
! [Tue 19:56:16 WARN ]     at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
! [Tue 19:56:16 WARN ]     at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
! [Tue 19:56:16 WARN ]     at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800)
! [Tue 19:56:16 WARN ]     at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:499)

! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
! [Tue 19:56:16 WARN ]     at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
! [Tue 19:56:16 WARN ]     at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
! [Tue 19:56:16 WARN ]     at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800)
! [Tue 19:56:16 WARN ]     at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:499)

it spams so much that it makes my server logs go >3gb with the server running for 4-5 hours with 10 players

the attack can go for hours even after he lefts the server or after a restart

idk how to fix or make it stop, the guy is also an a-hole and wont listen to anything we say

can somebody help?

! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
! [Tue 19:56:16 WARN ]     at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
! [Tue 19:56:16 WARN ]     at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
! [Tue 19:56:16 WARN ]     at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800)
! [Tue 19:56:16 WARN ]     at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:499)

! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
! [Tue 19:56:16 WARN ]     at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
! [Tue 19:56:16 WARN ]     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
! [Tue 19:56:16 WARN ]     at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
! [Tue 19:56:16 WARN ]     at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800)
! [Tue 19:56:16 WARN ]     at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:499)

packet server crasher?

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