====== NoIP ======
===== Telepítés =====
  - Program fájl telepítése: <code bash>
</code>
  - Indító script telepítése (''/etc/init.d/noip2''): <file bash noip2>
#!/bin/bash

### BEGIN INIT INFO
# Provides:          noip2
# Required-Start:
# Required-Stop:
# Should-Start:      $network $syslog
# Should-Stop:       $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start and stop noip2
# Description:       noip2 manages dyn dns
### END INIT INFO

. /lib/lsb/init-functions

set -euf -o pipefail

NOIP_BIN='/usr/local/bin/noip2'
NOIP_NAME='noip2'
NOIP_OPTIONS="${NOIP_OPTIONS:-}"


function do_start()
{
    local rc=0

    log_daemon_msg 'Starting dynamic DNS client...'
    "${NOIP_BIN}" ${NOIP_OPTIONS} || rc=$?
    log_end_msg "${rc}"

    return ${rc}
}

function do_stop()
{
    local rc=0
    local pid="$(get_pid)"

    if [ -z "${pid}" ]; then
        log_warning_msg "${NOIP_NAME} not running"
        return
    fi

    log_daemon_msg 'Stopping dynamic DNS client...'
    "${NOIP_BIN}" -K "${pid}" \
        && waiting_for_stop "${pid}" \
        || rc=$?
    log_end_msg "${rc}"

    return ${rc}
}

function get_pid()
{
    "${NOIP_BIN}" -S 2>&1 \
        | grep '^Process' \
            | sed -E 's>^Process ([0-9]+),.+$>\1>' \
                || true
}

function waiting_for_stop()
{
    local pid="$1"
    local waiting_cycles=10

    while kill -0 ${pid} 2>/dev/null; do
        waiting_cycles="$[${waiting_cycles} - 1]"
        if [ "${waiting_cycles}" -lt 1 ]; then
            log_failure_msg "failed to stop ${NOIP_NAME} daemon"
            return 1
        fi
        sleep 0.5
    done
}


case "$1" in
    start)
        do_start
        ;;
    stop)
        do_stop
        ;;
    restart)
        do_stop
        do_start
        ;;
    *)
        echo "Usage: $0 {start|stop|restart}"
        exit 1
esac
exit 0
</file> <code bash>
chmod +x /etc/init.d/noip2
</code>
  - Automatikus indítás és leállítás bekötése: <code bash>
update-rc.d noip2 defaults
</code>


==== Automatikus címfrissítés PPPoE kapcsolat esetén ====
  - Wrapper script beállítása (''/etc/ppp/ip-up.d/noip2''): <file bash noip2>
#!/bin/bash
#
# ip-up script for noip2

# Some useful variables, as noted at
# http://www.tldp.org/HOWTO/PPP-HOWTO/x1455.html
#
#       $1      the interface name used by pppd (e.g. ppp3)
#       $2      the tty device name
#       $3      the tty device speed
#       $4      the local IP address for the interface
#       $5      the remote IP address
#       $6      the parameter specified by the 'ipparam' option to pppd

# Restart noip2 daemon
NOIP_OPTIONS="-I $1" /etc/init.d/noip2 restart
</file> <code bash>
chmod +x /etc/ppp/ip-up.d/noip2
</code>