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Diffstat (limited to 'bin/ncp/SECURITY/fail2ban.sh')
-rw-r--r-- | bin/ncp/SECURITY/fail2ban.sh | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/bin/ncp/SECURITY/fail2ban.sh b/bin/ncp/SECURITY/fail2ban.sh new file mode 100644 index 00000000..e58a2dac --- /dev/null +++ b/bin/ncp/SECURITY/fail2ban.sh @@ -0,0 +1,174 @@ +#!/bin/bash + +# Fail2ban installation script for Raspbian +# +# Copyleft 2017 by Ignacio Nunez Hernanz <nacho _a_t_ ownyourbits _d_o_t_ com> +# GPL licensed (see end of file) * Use at your own risk! +# +# More at: https://ownyourbits.com/2017/02/24/nextcloudpi-fail2ban-installer/ +# + + +# time to ban an IP that exceeded attempts + +# cooldown time for incorrect passwords + +# bad attempts before banning an IP + + +# Option to activate email notifications + +# email to send notifications to + + +install() +{ + apt-get update + apt-get install --no-install-recommends -y fail2ban whois + update-rc.d fail2ban disable + rm -f /etc/fail2ban/jail.d/defaults-debian.conf + + [[ "$DOCKERBUILD" == 1 ]] && { + cat > /etc/services-available.d/100fail2ban <<EOF +#!/bin/bash + +source /usr/local/etc/library.sh + +[[ "\$1" == "stop" ]] && { + echo "stopping fail2ban..." + service fail2ban stop + exit 0 +} + +persistent_cfg /etc/fail2ban + +echo "Starting fail2ban..." +service fail2ban start + +exit 0 +EOF + chmod +x /etc/services-available.d/100fail2ban + } + + # tweak fail2ban email + local F=/etc/fail2ban/action.d/sendmail-common.conf + sed -i 's|Fail2Ban|NextCloudPi|' /etc/fail2ban/action.d/sendmail-whois-lines.conf + grep -q actionstart_ "$F" || sed -i 's|actionstart|actionstart_|' "$F" + grep -q actionstop_ "$F" || sed -i 's|actionstop|actionstop_|' "$F" + + # delay init because of automount + sed -i "/^ExecStart=/iExecStartPre=/bin/sleep 10" /lib/systemd/system/fail2ban.service + +} + +configure() +{ + [[ $ACTIVE != "yes" ]] && { + service fail2ban stop + update-rc.d fail2ban disable + echo "fail2ban disabled" + return + } + + local NCLOG="/var/www/nextcloud/data/nextcloud.log" + local NCLOG1="$( sudo -u www-data php /var/www/nextcloud/occ config:system:get logfile )" + + [[ "$NCLOG1" != "" ]] && NCLOG="$NCLOG1" + + local BASEDIR=$( dirname "$NCLOG" ) + [ -d "$BASEDIR" ] || { echo -e "directory $BASEDIR not found"; return 1; } + + sudo -u www-data touch "$NCLOG" || { echo -e "ERROR: user www-data does not have write permissions on $NCLOG"; return 1; } + + cd /var/www/nextcloud + sudo -u www-data php occ config:system:set loglevel --value=2 + sudo -u www-data php occ config:system:set log_type --value=file + + cat > /etc/fail2ban/filter.d/nextcloud.conf <<'EOF' +[INCLUDES] +before = common.conf + +[Definition] +failregex = Login failed.*Remote IP.*'<HOST>' +ignoreregex = +EOF + + [[ "$MAILALERTS" == "yes" ]] && local ACTION=action_mwl || local ACTION=action_ + + cat > /etc/fail2ban/jail.conf <<EOF +# The DEFAULT allows a global definition of the options. They can be overridden +# in each jail afterwards. +[DEFAULT] + +# "ignoreip" can be an IP address, a CIDR mask or a DNS host. Fail2ban will not +# ban a host which matches an address in this list. Several addresses can be +# defined using space separator. +ignoreip = 127.0.0.1/8 + +# "bantime" is the number of seconds that a host is banned. +bantime = $BANTIME + +# A host is banned if it has generated "maxretry" during the last "findtime" +# seconds. +findtime = $FINDTIME +maxretry = $MAXRETRY + +# +# ACTIONS +# +banaction = iptables-multiport +protocol = tcp +chain = INPUT +action_ = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"] +action_mwl = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"] + sendmail-whois-lines[name=%(__name__)s, dest=$EMAIL, sender=ncp-fail2ban@ownyourbits.com] +action = %($ACTION)s + +# +# SSH +# + +[ssh] + +enabled = true +port = ssh +filter = sshd +logpath = /var/log/auth.log +maxretry = $MAXRETRY + +# +# HTTP servers +# + +[nextcloud] + +enabled = true +port = http,https +filter = nextcloud +logpath = $NCLOG +maxretry = $MAXRETRY +EOF + cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local + update-rc.d fail2ban defaults + update-rc.d fail2ban enable + service fail2ban restart + echo "fail2ban enabled" +} + +# License +# +# This script is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This script is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this script; if not, write to the +# Free Software Foundation, Inc., 59 Temple Place, Suite 330, +# Boston, MA 02111-1307 USA + |