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in.timed(8)

in.timed(8)             System Administration Commands             in.timed(8)

NAME
       in.timed - UDP or TCP time protocol service daemon

SYNOPSIS
       /usr/lib/inet/in.timed

FMRI
       svc:/internet/time:default

DESCRIPTION
       The in.timed service provides the server-side of the time protocol. The
       time  server  sends  to  requestors the time in seconds since midnight,
       January 1, 1900. The time protocol is available on  both  TCP  and  UDP
       transports through port 37.


       The  in.timed  service  is  an  inetd(8)  delegated smf(7) service. The
       in.timed detects which transport is requested by examining  the  socket
       it is passed by the inetd daemon.

       TCP-based service

           Once  a connection is established, the in.timed sends the time as a
           32-bit binary number and closes the connection. Any  received  data
           is ignored.


       UDP-based service

           The  in.timed  listens  for  UDP  datagrams. When a datagram is re‐
           ceived, the server generates a UDP datagram containing the time  as
           a  32-bit  binary  number  and sends it to the client. Any received
           data is ignored.


USAGE
       The protocol used by in.timed represents time  as  an  unsigned  32-bit
       number of seconds ranging from January 1, 1900 to February 7, 2036. An‐
       other  method  of  time synchronization must be used for dates past the
       end of this range.


       For most purposes, NTP is strongly recommended over this  service.  For
       more information, see the ntpd(8) man pages.

ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:

       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _  Availabilityservice/network/legacy-network-services  _
       Interface StabilityCommitted


SEE ALSO
       attributes(7), smf(7), in.daytimed(8), inetadm(8), inetd(8), ntpd(8)


       Postel,  J. and K. Harrenstien. RFC 868, Time Protocol. Network Working
       Group. May 1983. https://tools.ietf.org/html/rfc868

NOTES
       The in.timed service is managed by  the  service  management  facility,
       smf(7), under the service identifier:

         svc:/internet/time:default



       Administrative actions on this service, such as enabling, disabling, or
       requesting  restart,  can  be performed using svcadm(8). Responsibility
       for initiating and restarting this service is  delegated  to  inetd(8).
       Use  inetadm(8) to make configuration changes and to view configuration
       information for this service. The service's status can be queried using
       the svcs(1) command.

HISTORY
       The in.timed program and the  svc:/internet/time:default  service  were
       added  in  the  Solaris 10 3/05 release. Prior to that, support for the
       time service was provided as a builtin part of inetd(8) since the  ini‐
       tial release of Solaris.


       Support for IPv6 was added in Solaris 8.


       The  time service was enabled by default in releases up through Solaris
       9, but has been disabled by default since the Solaris 10 3/05 release.

Oracle Solaris 11.4               12 May 2022                      in.timed(8)
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