timed(4)                                                           timed(4)

NAME
     timed - trusted hosts for the in.timed daemon

SYNOPSIS
     /etc/inet/timed

DESCRIPTION
     /etc/inet/timed contains entries for hosts that are trusted by the
     local time synchronization daemon in.timed.

     This is to prevent the local timed daemon

     -  from accepting as a slave (possibly incorrect) timestamps from
        arbitrary masters and setting the local time accordingly

     -  from accepting as a master (system time wrong) timestamps from
        arbitrary slaves and calculating the network time from them

     Three levels of trustworthiness are defined:

     -  A host is trusted as a time synchronization master and slave

     -  A host is trusted only as a time synchronization slave

     -  A host is not accepted as a partner for time synchronization by
        in.timed

     Entries in /etc/inet/timed have the following format:

     host name    keyword     #comment

     Possible keywords are master or slave. They have the following mean-
     ings:

     slave     The specified host is a trusted slave.

     master    The specified host is a trusted master or slave.

     Entries with missing keywords are treated as master entries. Entries
     with illegal keywords are ignored. If there are multiple entries for
     the same host, only the first entry is significant.

     Comments are always optional.

     The special host name * defines the role for all hosts not explicitly
     listed.

     If /etc/inet/timed is empty or does not exist any host is considered a
     trusted master or slave.






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timed(4)                                                           timed(4)

     Example:

     saturn      master   # first master server
     orion       master   # second master server
     *           slave    # all other are trusted slaves

     Entries in /etc/inet/timed will control the behavior of in.timed(1M)
     as follows, if the local in.timed is a slave:

     -  If in.timed detects a non-trusted master in the network at startup,
        it will exit.

     -  If in.timed detects the startup of a non-trusted master, it will
        not communicate with this master.

     -  If a new master is chosen, in.timed will reject every candidate
        which is not a trusted master.

     If the local in.timed is started with the -M flag (i.e. as a potential
     master) and the local host is not a trusted master, it will not claim
     the master role.

     If the local in.timed is a master it will only collect timestamps from
     trusted slaves to calculate the network time.

SEE ALSO
     timed(1M).



























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