How Do I Know If I Have a Safe Version of NTP on a Linux Server?

Question  How do I know if I have a safe version of NTP on a Linux server?

Background  The United States Computer Emergency Readiness Team's website indicates that this many versions of NTP are susceptible to a denial-of-service attack.

Answer  Run this command:  ntpd --version

The output should look something like this:

ntpd 4.2.8p9

If it is lower than that (e.g., ntpd 4.2.8p8), then you need to upgrade your ntp version.

Leave a comment

Your email address will not be published. Required fields are marked *