NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not susceptible to being used in distributed denial-of-service (DDoS) attacks. Please also take this opportunity to defeat denial-of-service attacks by implementing Ingress and Egress filtering through BCP38.
ntp-4.2.8p12
was released on 14 August 2018. It addresses 1 low-/medium-severity security issue in ntpd, 1 low-severity security issue in ntpq and ntpdc, and provides 27 non-security bugfixes and 4 other improvements over 4.2.8p11.
Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.
Managing Your Time Server List Entries
Creating a new List entry

You must be a
registered TWiki member to create a List entry for your Time Server. You will be prompted to login when necessary.
Entering the server information
There are two places to enter information
on the edit page:
- The text area
- The ServerForm
Use the ServerForm to enter the standard information about your Time Server. The ServerForm is located below the text area.
Use the text area for general notes that don't fit in the ServerForm. Please keep these notes short and create them as bullet items under the
Notes: heading. Please keep long policy documents on your web-server and just create links to them.

Please see the
TextFormattingRules for more information about the simple TWiki
Text Formatting Rules. There is a handy link to
Text Formatting Rules at the bottom of the text area on the topic
edit page.
Protecting your List entry
The ALLOWTOPICCHANGE variable under the
settings: heading of your List entry is used to prevent others from making unauthorized modifications to your Time Server information. The format is:
* Set ALLOWTOPICCHANGE = %MAINWEB%.YourWikiName
The ALLOWTOPICCHANGE variable is automatically populated with your
WikiName when you create a Time Server List entry.
The ALLOWTOPICCHANGE variable will accept a comma delimited list of
WikiNames and/or
TWikiGroups in the event that you need to grant multiple editors permission to maintain your Time Server information. Please contact
webmaster@ntp.org if you wish to set up a
TWikiGroup for your Time Server.
You should know the members of the
TWikiAdminGroup will be able to edit your Time Server List entry regardless of the ALLOWTOPICCHANGE setting.
Saving your List Entry
When you're done you may either save or preview your server entry.
To save: click the
[save]
button at the top of the page (or use the
Alt-s
shortcut).
To preview: click the
[preview]
button at the top of the page (or use the
Alt-p
shortcut) to preview the page. If you want to change something use your browser back button to return to the edit page. Make sure to click the
[save]
button on the preview page to actually save your updated entry.
Editing an existing List entry

You must be a
registered TWiki member to edit an existing List entry for your Time Server. You will be prompted to login when necessary.
Time Server List entries which were imported from the previous lists were locked to prevent unauthorized modification. Please contact
webmaster@ntp.org to get your
WikiName added to the Access Control List.
Finding the List entry
You may search for your List entry by entering a portion of your host name (e.g. the domain) as
lower case text in the
Go/Search box at the top of any page and clicking the
Go/Search button. If there is only one match you will, after a few seconds, see that Time Server List entry. If there are multiple matches you will, after a few seconds, see a page listing the entries.
Editing the server information
There are two places to enter information on the
edit page:
- The ServerForm
- The text area
Use the ServerForm for the standard information about your Time Server.
Use the text area for general notes that don't fit in the ServerForm. Please keep these notes short and create them as bullet items under the
Notes: heading. Please keep long policy documents on your web-server and just create links to them.

Please see the
TextFormattingRules for more information about the simple TWiki
Text Formatting Rules. There is a handy link to
Text Formatting Rules at the bottom of the text area on the topic
edit page.
Saving your changes
When you're done you may either save or preview your server entry.
To save: click the
[save]
button at the top of the page (or use the
Alt-s
shortcut).
To preview: click the
[preview]
button at the top of the page (or use the
Alt-p
shortcut) to preview the page. If you want to change something use your browser back button to return to the edit page. Make sure to click the
[save]
button on the preview page to actually save your updated entry.
Who to ask for help
For assistance with your Time Server list entry please send e-mail to
webmaster@ntp.org or stop by
irc.freenode.net #ntp.