DDOS

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dukevin
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DDOS

Post by dukevin »

I've been told that someone is trying to DDoS one of my servers. I checked the console log on the server and the log is filled with messages like:

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[33] nKillHim signal caught: Killing user 33, ping 1.25, IP 130.102.147.132:53: An error occurred while processing messages from your client. This usually indicates a client or server bug.
Is this evidence of such action?
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takburger
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Re: DDOS

Post by takburger »

The nature of the request do not count so much, it is more about the number of them for 1 second of time.
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dukevin
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Re: DDOS

Post by dukevin »

There was probably a dozen per second spamming the console
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Z-Man
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Re: DDOS

Post by Z-Man »

Yep, that either is a DoS (no extra D) attempt or a confused client. Sometimes, when a client loses the connection, for example when its IP changes, it keeps sending packets to the server that the server cannot process. Those are usually ignored outright, though. Just a single, small rejection packet is sent in response to a message that causes an nKillHim, so apart from the log spam, there should be no significant damage (there may have been more for previous versions of the server). A spectator causes more network traffic and CPU load.
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