# Permit all access over the loopback interface. This could # be tightened as well, but to do so would effect some of # the administrative functions. restrict 127.0.0.1 # -- CLIENT NETWORK ------- # Permit systems on this network to synchronize with this # time service. Do not permit those systems to modify the # configuration of this service. Also, do not use those # systems as peers for synchronization. restrict 192.168.2.0 mask 255.255.255.0 nomodify notrap #restrict 192.168.2.254 mask 255.255.255.255 nomodify notrap # --- OUR TIMESERVERS ----- server clock.redhat.com server 144.118.24.20 server 144.118.24.10 server louie.udel.edu # --- GENERAL CONFIGURATION --- # Undisciplined Local Clock. This is a fake driver intended for backup # and when no outside source of synchronized time is available. The # default stratum is usually 3, but in this case we elect to use stratum # 0. Since the server line does not have the prefer keyword, this driver # is never used for synchronization, unless no other other # synchronization source is available. In case the local host is # controlled by some external source, such as an external oscillator or # another protocol, the prefer keyword would cause the local host to # disregard all other synchronization sources, unless the kernel # modifications are in use and declare an unsynchronized condition. server 127.127.1.1 fudge 127.127.1.1 stratum 3 refid NIST # Drift file. Put this in a directory which the daemon can write to. # No symbolic links allowed, either, since the daemon updates the file # by creating a temporary in the same directory and then rename()'ing # it to the file. driftfile /var/lib/ntp/ntp.drift # Gather some runtime info statsdir /var/lib/ntp/stats/ logfile /var/log/ntpd.log # Keys file. If you want to diddle your server at run time, make a # keys file (mode 600 for sure) and define the key number to be # used for making requests. # # PLEASE DO NOT USE THE DEFAULT VALUES HERE. Pick your own, or remote # systems might be able to reset your clock at will. Note also that # ntpd is started with a -A flag, disabling authentication, that # will have to be removed as well. keys /etc/ntp/keys # Other options statistics sysstats peerstats disable auth enable stats