xenial (5) ntp.keys.5.gz

Provided by: ntp_4.2.8p4+dfsg-3ubuntu5.10_amd64 bug

NAME
       ntp.keys - NTP symmetric key file format configuration file


SYNOPSIS
        [--option-name] [--option-name value]

       All arguments must be options.


DESCRIPTION
       This  document  describes  the format of an NTP symmetric key file.  For a description of the use of this
       type of file, see the "Authentication Support" section of the ntp.conf(5) page.

       ntpd(8) reads its keys from a file specified using the -k command line option or the  keys  statement  in
       the configuration file.  While key number 0 is fixed by the NTP standard (as 56 zero bits) and may not be
       changed, one or more keys numbered between 1 and 65534 may be arbitrarily set in the keys file.

       The key file uses the same comment conventions as the configuration file.  Key entries use a fixed format
       of the form

           keyno type key

       where keyno is a positive integer (between 1 and 65534), type is the message digest algorithm, and key is
       the key itself.

       The key may be given in a format controlled by the type field.  The type MD5  is  always  supported.   If
       ntpd  was  built  with  the  OpenSSL  library  then  any  digest library supported by that library may be
       specified.  However, if compliance with FIPS 140-2 is required the type must be either SHA or SHA1.

       What follows are some key types, and corresponding formats:

       MD5    The key is 1 to 16 printable characters terminated by an EOL, whitespace, or a  #  (which  is  the
              "start of comment" character).

       SHA
       SHA1
       RMD160 The key is a hex-encoded ASCII string of 40 characters, which is truncated as necessary.

       Note  that  the keys used by the ntpq(8) and ntpdc(8) programs are checked against passwords requested by
       the programs and entered by hand, so it is generally appropriate to specify these keys in ASCII format.


FILES
       /etc/ntp.keys the default name of the configuration file


SEE ALSO
       ntp.conf(5), ntpd(1), ntpdate(1), ntpdc(1), sntp(1)


AUTHORS
       The University of Delaware and Network Time Foundation


       Copyright (C) 1992-2015 The University of Delaware and Network Time Foundation all rights reserved.  This
       program is released under the terms of the NTP license, <http://ntp.org/license>.


BUGS
       Please send bug reports to: http://bugs.ntp.org, bugs@ntp.org


NOTES
       This document was derived from FreeBSD.

       This manual page was AutoGen-erated from the ntp.keys option definitions.