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--- informatica:linux:ntp [2012/06/12 15:01] – creado javi
+++ informatica:linux:ntp [2012/06/15 10:20] – javi
@@ Line 3: / Line 3: @@
 ntp ntpq time
-===== Servidor ======
+===== Paquetes ======
-. Instalar paquetes:
+Comunnes para cliente y servidor:
-  sudo aptitude install ntp ntpdate ntp-server
+  sudo aptitude install ntp ntpdate
+===== Servidor ======
 . Actualizar configuracion:
   sudo mv /etc/ntp.conf /etc/ntp.conf.old
@@ Line 16: / Line 18: @@
 <code>
-TBD
+# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
+driftfile /var/lib/ntp/ntp.drift
+# pool.ntp.org maps to about 1000 low-stratum NTP servers.  Your server will
+# pick a different set every time it starts up.  Please consider joining the
+# pool: <http://www.pool.ntp.org/join.html>
+server 0.es.pool.ntp.org
+server 1.es.pool.ntp.org
+server 2.es.pool.ntp.org
+# By default, exchange time with everybody, but don't allow configuration.
+restrict -4 default kod notrap nomodify nopeer noquery
+restrict -6 default kod notrap nomodify nopeer noquery
+# Local users may interrogate the ntp server more closely.
+restrict 127.0.0.1
+restrict ::1
+# http://support.ntp.org/bin/view/Support/AccessRestrictions#Section_6.5.1.2.
+# In theory I should use IP addresses on 'restrict'
+restrict 0.es.pool.ntp.org mask 255.255.255.255 nomodify
+restrict 1.es.pool.ntp.org mask 255.255.255.255 nomodify
+restrict 2.es.pool.ntp.org mask 255.255.255.255 nomodify
+# LAN
+restrict 10.0.0.0 mask 255.255.255.0 nomodify notrap nopeer
 </code>
 . Para NTP:
   sudo /etc/init.d/ntp stop
 . Sincronizar (en este ejemplo el servidor es 0.es.pool.ntp.org)
   ntpdate 0.es.pool.ntp.org
 . Arrancar NTP:
   sudo /etc/init.d/ntp start
@@ Line 33: / Line 61: @@
 ===== Cliente ======
-. Instalar paquetes:
+. Actualizar configuracion:
-  sudo aptitude install ntp ntp-simple ntpdate
-. Actualizar configuracion:
   sudo mv /etc/ntp.conf /etc/ntp.conf.old
@@ Line 44: / Line 68: @@
 <code>
+# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
 driftfile /var/lib/ntp/ntp.drift
 server time-1.dev.jj.com
-restrict -4 default kod notrap nomodify nopeer noquery
-restrict -6 default kod notrap nomodify nopeer noquery
+restrict -4 default ignore
+restrict -6 default ignore
 restrict 127.0.0.1
 restrict ::1
+restrict time-1.dev.jj.com
 </code>
-. Para NTP:
+Sincronizamos el cliente contra el servidor (time-1.dev.jj.com) y permitimos acceso local, todo lo demas lo cerramos.
+. Parar NTP:
   sudo /etc/init.d/ntp stop
 . Sincronizar (en este ejemplo el servidor es time-1.dev.jj.com)
   ntpdate time-1.dev.jj.com
 . Arrancar NTP:
   sudo /etc/init.d/ntp start