[Bug 262391] ntp.conf contains wrong information regarding leapfile

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262391

            Bug ID: 262391
           Summary: ntp.conf contains wrong information regarding leapfile
           Product: Base System
           Version: 13.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: misc
          Assignee: bugs@FreeBSD.org
          Reporter: dclarke@blastwave.org

The default ntp.conf file has a comment on the bottom that says : 

# See http://support.ntp.org/bin/view/Support/ConfiguringNTP#Section_6.14.
# for documentation regarding leapfile. Updates to the file can be obtained
# from ftp://time.nist.gov/pub/ or ftp://tycho.usno.navy.mil/pub/ntp/.
# Use either leapfile in /etc/ntp or periodically updated leapfile in /var/db.
#leapfile "/etc/ntp/leap-seconds"

However, as far as I can tell, neither of those ftp sites exist. The
dns records for either do not exist. However one may attain the recent
leap seconds file from :

    https://www.ietf.org/timezones/data/leap-seconds.list

See bottom of :

    https://support.ntp.org/bin/view/Support/ConfiguringNTP#Section_6.14.

A trivial fetch "just works" : 

europa# 
europa# uname -apKU 
FreeBSD europa 13.0-RELEASE-p7 FreeBSD 13.0-RELEASE-p7 #0: Mon Jan 31 18:24:03
UTC 2022    
root@amd64-builder.daemonology.net:/usr/obj/usr/src/amd64.amd64/sys/GENERIC 
amd64 amd64 1300139 1300139
europa# 
europa# fetch https://www.ietf.org/timezones/data/leap-seconds.list 
fetch: https://www.ietf.org/timezones/data/leap-seconds.list: size of remote
file is not known
leap-seconds.list                                       10 kB 3151 kBps    00s
europa# 
europa# ls -l leap-seconds.list 
-rw-r--r--  1 root  wheel  10659 Oct 22 02:20 leap-seconds.list
europa# 
europa# file leap-seconds.list 
leap-seconds.list: ASCII text
europa# 
europa# wc -l leap-seconds.list 
     255 leap-seconds.list
europa# 
europa# head leap-seconds.list 
#
#       In the following text, the symbol '#' introduces
#       a comment, which continues from that symbol until
#       the end of the line. A plain comment line has a
#       whitespace character following the comment indicator.
#       There are also special comment lines defined below.
#       A special comment will always have a non-whitespace
#       character in column 2.
#
#       A blank line should be ignored.
europa# 

It may be reasonable to update the default ntp.conf file as well as
fetch the leap seconds file during installation if the ntp option
has been selected. 

Dennis Clarke

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