46 lines
907 B
Bash
46 lines
907 B
Bash
#!/bin/bash
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# Simple Fail2ban configuration
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# SwITNet Ltd © - 2021, https://switnet.net/
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# GNU GPLv3 or later.
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while getopts m: option
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do
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case "${option}"
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in
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m) MODE=${OPTARG};;
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\?) echo "Usage: sudo ./fail2ban_ssh.sh [-m debug]" && exit;;
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esac
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done
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#DEBUG
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if [ "$MODE" = "debug" ]; then
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set -x
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fi
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#Check if user is root
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if ! [ $(id -u) = 0 ]; then
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echo "You need to be root or have sudo privileges!"
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exit 0
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fi
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apt-get -y install fail2ban
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if \
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[ -f /var/log/ssh_f2b.log ] && \
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[ $(grep -c 604800 /etc/fail2ban/jail.local) = "1" ] && \
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[ $(grep -c ssh_f2b.log /etc/fail2ban/jail.local) = "1"]; then
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echo -e "\nFail2ban seems to be already configured.\n"
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else
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echo -e "\nConfiguring Fail2ban...\n"
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cat << F2BAN >> /etc/fail2ban/jail.local
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[sshd]
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enabled = true
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port = 22
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filter = sshd
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logpath = /var/log/ssh_f2b.log
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maxretry = 3
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bantime = 604800
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F2BAN
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fi
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systemctl restart fail2ban
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