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Question fail2ban-server and systemd-logind high cpu usage, log file auth.log 200Gb

B

bendim

New Pleskian
Server operating system version
Debian
Plesk version and microupdate number
18.0.48
Hello,
today i checked my grafana board and saw high cup usage and my 500Gb disk space was full.

htop shows fail2ban-server and systemd-logind 100% usage.
I searched for big files with the following command.
Bash: 
find / -type f -size +100M -exec du -h {} + 2>/dev/null | sort -r -h
259G    /var/log/auth.log
144G    /var/log/daemon.log
39G    /var/log/syslog.1
18G    /var/log/syslog

I stoped the fail2ban service temporarily to solve the problem.
Was my server hacked or is someone trying to hack it, or is it "only" a plesk problem.

Debian with Plesk Obsidian 18.0.48
 
Very similar to an attack on your server. I think it would be worth examining the fail2ban logs, for example, to get more details.
 
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