Linux ip-172-26-7-228 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64
Your IP : 18.218.123.194
#! /bin/sh
### BEGIN INIT INFO
# Provides: fail2ban
# Required-Start: $local_fs $remote_fs
# Required-Stop: $local_fs $remote_fs
# Should-Start: $time $network $syslog $named iptables firehol shorewall ipmasq arno-iptables-firewall iptables-persistent ferm ufw
# Should-Stop: $network $syslog $named iptables firehol shorewall ipmasq arno-iptables-firewall iptables-persistent ferm ufw
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start/stop fail2ban
# Description: Start/stop fail2ban, a daemon scanning the log files and
# banning potential attackers.
### END INIT INFO
# Author: Aaron Isotton <aaron@isotton.com>
# Modified: by Yaroslav Halchenko <debian@onerussian.com>
# reindented + minor corrections + to work on sarge without modifications
# Modified: by Glenn Aaldering <glenn@openvideo.nl>
# added exit codes for status command
# Modified: by Juan Karlo de Guzman <jkarlodg@gmail.com>
# corrected the DAEMON's path and the SOCKFILE
# rename this file: (sudo) mv /etc/init.d/fail2ban.init /etc/init.d/fail2ban
# same with the logrotate file: (sudo) mv /etc/logrotate.d/fail2ban.logrotate /etc/logrotate.d/fail2ban
#
PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/bin
DESC="authentication failure monitor"
NAME=fail2ban
# fail2ban-client is not a daemon itself but starts a daemon and
# loads its with configuration
DAEMON=/usr/bin/$NAME-client
SCRIPTNAME=/etc/init.d/$NAME
# Ad-hoc way to parse out socket file name
SOCKFILE=`grep -h '^[^#]*socket *=' /etc/$NAME/$NAME.conf /etc/$NAME/$NAME.local 2>/dev/null \
| tail -n 1 | sed -e 's/.*socket *= *//g' -e 's/ *$//g'`
[ -z "$SOCKFILE" ] && SOCKFILE='/var/run/fail2ban.sock'
# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0
# Run as root by default.
FAIL2BAN_USER=root
# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
DAEMON_ARGS="$FAIL2BAN_OPTS"
# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS
# Predefine what can be missing from lsb source later on -- necessary to run
# on sarge. Just present it in a bit more compact way from what was shipped
log_daemon_msg () {
[ -z "$1" ] && return 1
echo -n "$1:"
[ -z "$2" ] || echo -n " $2"
}
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
# Actually has to (>=2.0-7) present in sarge. log_daemon_msg is predefined
# so we must be ok
. /lib/lsb/init-functions
#
# Shortcut function for abnormal init script interruption
#
report_bug()
{
echo $*
echo "Please submit a bug report to Debian BTS (reportbug fail2ban)"
exit 1
}
#
# Helper function to check if socket is present, which is often left after
# abnormal exit of fail2ban and needs to be removed
#
check_socket()
{
# Return
# 0 if socket is present and readable
# 1 if socket file is not present
# 2 if socket file is present but not readable
# 3 if socket file is present but is not a socket
[ -e "$SOCKFILE" ] || return 1
[ -r "$SOCKFILE" ] || return 2
[ -S "$SOCKFILE" ] || return 3
return 0
}
#
# Function that starts the daemon/service
#
do_start()
{
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
do_status && return 1
if [ -e "$SOCKFILE" ]; then
log_failure_msg "Socket file $SOCKFILE is present"
[ "$1" = "force-start" ] \
&& log_success_msg "Starting anyway as requested" \
|| return 2
DAEMON_ARGS="$DAEMON_ARGS -x"
fi
# Assure that /var/run/fail2ban exists
[ -d /var/run/fail2ban ] || mkdir -p /var/run/fail2ban
if [ "$FAIL2BAN_USER" != "root" ]; then
# Make the socket directory, IP lists and fail2ban log
# files writable by fail2ban
chown "$FAIL2BAN_USER" /var/run/fail2ban
# Create the logfile if it doesn't exist
touch /var/log/fail2ban.log
chown "$FAIL2BAN_USER" /var/log/fail2ban.log
find /proc/net/xt_recent -name 'fail2ban-*' -exec chown "$FAIL2BAN_USER" {} \;
fi
start-stop-daemon --start --quiet --chuid "$FAIL2BAN_USER" --exec $DAEMON -- \
$DAEMON_ARGS start > /dev/null\
|| return 2
return 0
}
#
# Function that checks the status of fail2ban and returns
# corresponding code
#
do_status()
{
$DAEMON ping > /dev/null 2>&1
return $?
}
#
# Function that stops the daemon/service
#
do_stop()
{
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
$DAEMON status > /dev/null 2>&1 || return 1
$DAEMON stop > /dev/null || return 2
# now we need actually to wait a bit since it might take time
# for server to react on client's stop request. Especially
# important for restart command on slow boxes
count=1
while do_status && [ $count -lt 60 ]; do
sleep 1
count=$(($count+1))
done
[ $count -lt 60 ] || return 3 # failed to stop
return 0
}
#
# Function to reload configuration
#
do_reload() {
$DAEMON reload > /dev/null && return 0 || return 1
return 0
}
# yoh:
# shortcut function to don't duplicate case statements and to don't use
# bashisms (arrays). Fixes #368218
#
log_end_msg_wrapper()
{
if [ "$3" != "no" ]; then
[ $1 -lt $2 ] && value=0 || value=1
log_end_msg $value
fi
}
command="$1"
case "$command" in
start|force-start)
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
do_start "$command"
log_end_msg_wrapper $? 2 "$VERBOSE"
;;
stop)
[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
do_stop
log_end_msg_wrapper $? 2 "$VERBOSE"
;;
restart|force-reload)
log_daemon_msg "Restarting $DESC" "$NAME"
do_stop
case "$?" in
0|1)
do_start
log_end_msg_wrapper $? 1 "always"
;;
*)
# Failed to stop
log_end_msg 1
;;
esac
;;
reload|force-reload)
log_daemon_msg "Reloading $DESC" "$NAME"
do_reload
log_end_msg $?
;;
status)
log_daemon_msg "Status of $DESC"
do_status
case $? in
0) log_success_msg " $NAME is running" ;;
255)
check_socket
case $? in
1) log_failure_msg " $NAME is not running" && exit 3 ;;
0) log_failure_msg " $NAME is not running but $SOCKFILE exists" && exit 3 ;;
2) log_failure_msg " $SOCKFILE not readable, status of $NAME is unknown" && exit 3 ;;
3) log_failure_msg " $SOCKFILE exists but not a socket, status of $NAME is unknown" && exit 3 ;;
*) report_bug "Unknown return code from $NAME:check_socket." && exit 4 ;;
esac
;;
*) report_bug "Unknown $NAME status code" && exit 4
esac
;;
*)
echo "Usage: $SCRIPTNAME {start|force-start|stop|restart|force-reload|status}" >&2
exit 3
;;
esac
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