Linux sicherheit

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Programme

  • chkrootkit - Linux rootkit scanner
  • Lynis - Universal security auditing tool and rootkit scanner
lynis update info
lynis audit system
  • rkhunter
rkhunter --update
rkhunter -c

Quellen


fail2ban

den server absichern gegen DoS Angriffe

apt install fail2ban
sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local
  • wichtig sind die einträge zu verändern, z.B.
# "bantime" is the number of seconds that a host is banned.
bantime  = 30m

# A host is banned if it has generated "maxretry" during the last "findtime"
# seconds.
findtime  = 20m

# "maxretry" is the number of failures before a host get banned.
maxretry = 2
fail2ban-client status sshd
tail -f /var/log/fail2ban.log