Use tldsate instead of ntp #24
This commit is contained in:
Bob Mottram
parent
18c5f6b7c8
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ca6ae2e144
208
beaglebone.txt
208
beaglebone.txt
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@ -1,7 +1,7 @@
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#+TITLE: FreedomBone
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#+AUTHOR: Bob Mottram
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#+EMAIL: bob@robotics.uk.to
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#+KEYWORDS: freedombox, debian, beaglebone, friendica, email, web server, home server, internet, censorship, surveillance, social network, irc, jabber, chat
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#+KEYWORDS: freedombox, debian, beaglebone, friendica, email, web server, home server, internet, censorship, surveillance, social network, irc, jabber
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#+DESCRIPTION: Turn the Beaglebone Black into a personal communications server
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#+OPTIONS: ^:nil
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#+STYLE: <link rel="stylesheet" type="text/css" href="index.css" />
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@ -690,12 +690,212 @@ hostname -f
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it should return your domain name.
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** Install NTP
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** Install time synchronisation
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To synchronise time.
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#+BEGIN_VERSE
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/You may delay, but time will not./
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-- Benjamin Franklin
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#+END_VERSE
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It's convenient to have the clock on your server automatically synchronised with other servers on the internet so that you don't need to set the clock manually.
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First install some prerequisites.
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#+BEGIN_SRC: bash
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apt-get install ntp
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apt-get install build-essential automake git
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#+END_SRC
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Now download and install tlsdate.
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#+BEGIN_SRC: bash
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cd /tmp
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git clone https://github.com/ioerror/tlsdate.git
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cd tlsdate
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./autogen.sh
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./configure
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make
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make install
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#+END_SRC
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Create an init script.
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#+BEGIN_SRC: bash
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emacs /etc/init.d/tlsdated
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#+END_SRC
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Add the following:
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#+BEGIN_SRC: bash
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#!/bin/sh
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### BEGIN INIT INFO
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# Provides: tlsdate
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# Required-Start: $network $local_fs $remote_fs
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# Required-Stop: $local_fs $remote_fs
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: secure parasitic rdate replacement
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# Description: tlsdate sets the local clock by securely connecting with
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# TLS to remote servers and extracting the remote time out
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# of the secure handshake. Unlike ntpdate, tlsdate uses
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# TCP, for instance connecting to a remote HTTPS or TLS
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# enabled service, and provides some protection against
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# adversaries that try to feed you malicious time
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# information.
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#
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### END INIT INFO
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# Author: Jacob Appelbaum <jacob@appelbaum.net>
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# PATH should only include /usr/* if it runs after the mountnfs.sh script
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PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin
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DESC="secure parasitic rdate replacement daemon"
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NAME=tlsdated
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DAEMON=/usr/local/sbin/tlsdated
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DAEMON_ARGS=""
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PIDFILE=/var/run/$NAME.pid
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SCRIPTNAME=/etc/init.d/$NAME
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# Exit if the package is not installed
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[ -x $DAEMON ] || exit 0
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# Read configuration variable file if it is present
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[ -r /etc/default/$NAME ] && . /etc/default/$NAME
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# Load the VERBOSE setting and other rcS variables
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. /lib/init/vars.sh
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# Define LSB log_* functions.
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# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
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. /lib/lsb/init-functions
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#
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# Function that starts the daemon/service
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#
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do_start()
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{
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# Return
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# 0 if daemon has been started
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# 1 if daemon was already running
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# 2 if daemon could not be started
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start-stop-daemon --background --start --quiet --pidfile $PIDFILE \
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--exec $DAEMON --test > /dev/null \
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|| return 1
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start-stop-daemon --background --start --quiet --pidfile $PIDFILE \
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--exec $DAEMON -- \
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$DAEMON_ARGS \
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|| return 2
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# Add code here, if necessary, that waits for the process to be ready
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# to handle requests from services started subsequently which depend
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# on this one. As a last resort, sleep for some time.
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}
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#
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# Function that stops the daemon/service
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#
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do_stop()
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{
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# Return
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# 0 if daemon has been stopped
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# 1 if daemon was already stopped
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# 2 if daemon could not be stopped
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# other if a failure occurred
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start-stop-daemon --stop --quiet --retry=TERM/5/KILL/1 --pidfile $PIDFILE \
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--name $NAME
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RETVAL="$?"
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[ "$RETVAL" = 2 ] && return 2
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# Wait for children to finish too if this is a daemon that forks
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# and if the daemon is only ever run from this initscript.
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# If the above conditions are not satisfied then add some other code
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# that waits for the process to drop all resources that could be
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# needed by services started subsequently. A last resort is to
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# sleep for some time.
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start-stop-daemon --stop --quiet --oknodo --retry=0/5/KILL/5 --exec $DAEMON
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[ "$?" = 2 ] && return 2
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# Many daemons don't delete their pidfiles when they exit.
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rm -f $PIDFILE
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return "$RETVAL"
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}
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#
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# Function that sends a SIGHUP to the daemon/service
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#
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do_reload() {
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#
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# If the daemon can reload its configuration without
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# restarting (for example, when it is sent a SIGHUP),
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# then implement that here.
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#
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start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
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return 0
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}
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case "$1" in
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start)
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[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
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do_start
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case "$?" in
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0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
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2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
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esac
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;;
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stop)
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[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
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do_stop
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case "$?" in
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0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
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2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
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esac
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;;
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status)
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status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
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;;
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#reload|force-reload)
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#
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# If do_reload() is not implemented then leave this commented out
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# and leave 'force-reload' as an alias for 'restart'.
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#
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#log_daemon_msg "Reloading $DESC" "$NAME"
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#do_reload
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#log_end_msg $?
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#;;
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restart|force-reload)
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#
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# If the "reload" option is implemented then remove the
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# 'force-reload' alias
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#
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log_daemon_msg "Restarting $DESC" "$NAME"
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do_stop
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case "$?" in
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0|1)
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do_start
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case "$?" in
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0) log_end_msg 0 ;;
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1) log_end_msg 1 ;; # Old process is still running
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*) log_end_msg 1 ;; # Failed to start
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esac
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;;
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*)
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# Failed to stop
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log_end_msg 1
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;;
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esac
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;;
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*)
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echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
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exit 3
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;;
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esac
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:
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#+END_SRC
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Save and exit, then start the daemon.
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#+BEGIN_SRC: bash
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chmod +x /etc/init.d/tlsdated
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update-rc.d tlsdated defaults
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service tlsdated start
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#+END_SRC
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** Install fail2ban
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