Showing results for 
Show  only  | Search instead for 
Did you mean: 
Message 1 of 5

Internet Time Synchronization blocked

(New to this forum, I apologize up-front if I'm kicking-in open doors; I did search but could find a direct hit on this)

My PC time didn't appear to synchronize with the Internet time servers. After quite some Google-ing, I found that in Internet Security 2010 the 'time-sync port' (#123) appears to be closed by default. I opened it manually and now it works.

Makes me wonder however: why was this closed in the first place by McAfee? By opening it, do I run a risk then?

4 Replies
Former Member
Message 2 of 5

Re: Internet Time Synchronization blocked

Thanks for posting this. My McAfee SW was recently updated automatically to version 10. Among other issues, I notice that my Internet Time Synchronization was failing too. I followed your lead and checked to see if the 'Time-sync port' was blocked. Sure enough it was. I manually unblocked the port and my Internet Time Synchronization function is working again. I have no idea why McAfee is blocking this port by default. If there is a danger in opening this port I do not know what it could be. Prior to this update, it been open and active for years with no issues. Maybe someone else can comment on that concern.

Reliable Contributor
Reliable Contributor
Message 3 of 5

Re: Internet Time Synchronization blocked

Go to Useful Links at the top of this page and contact Technical Support Chat. I am curious to this question also. I checked my setting and it is closed but my time sync works OK.

Message 4 of 5

Re: Internet Time Synchronization blocked

I've found often that simply telling Windows Time to use a different server does the trick.  McAfee does not block known Windows processes.  That said there is a built-in setting that can be changed in McAfee SecurityCenter > Web and Email Protection > Firewall > Ports and System Services > Network Time Protocol Port 123 which can be checked and this sometimes helps.

I haven't detected (Using ShieldsUp) any weakening in protection by enabling this but then I'm also behind a router with an additional firewall so any tests always stop at it.

Message was edited by: Ex_Brit on 10/05/10 3:40:04 EDT PM
Message 5 of 5

Re: Internet Time Synchronization blocked

Fix coming very soon so we have been told

How Many Badges Can You Collect?
Ready for a little competition? Members like you are earning badges and unlocking perks for their helpful answers. Are you? Click here to find out.

Community Help Hub

    New to the forums or need help finding your way around the forums? There's a whole hub of community resources to help you.

  • Find Forum FAQs
  • Learn How to Earn Badges
  • Ask for Help
Go to Community Help

Join the Community

    Thousands of customers use the McAfee Community for peer-to-peer and expert product support. Enjoy these benefits with a free membership:

  • Get helpful solutions from McAfee experts.
  • Stay connected to product conversations that matter to you.
  • Participate in product groups led by McAfee employees.
Join the Community
Join the Community