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Impact of NTP over Network

Created: 28 May 2012 | 6 comments


What may be the impact if we install Symantec with NTP and without NTP?

Any traffic gets affected due to that?

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Mithun Sanghavi's picture


What version of SEP 12.1 are you running?

Here is an Article which explains: Default Symantec Endpoint Protection 12.1 RU1 Firewall Policy

I would suggest you to follow the Best Practices - Best Practices for Installing Symantec Endpoint Protection on Windows Servers

Also, check this Article:

About Windows Firewall and Symantec Endpoint Protection's NTP

Hope that helps!!

Mithun Sanghavi
Associate Security Architect


Don't forget to mark your thread as 'SOLVED' with the answer that best helped you.

Srikanth_Subra's picture


As per this is telling as when symantec is installed with NTP it automatically disables the windows firewall..

is it true? really symantec will disable the windows FW?

Thanks & Regards,


"Defeat the Defeat before the Defeat Defeats you"
(Swami Vivekananda)

NRaj's picture

The below might give you an idea

Symantec Endpoint Protection 11.0 Network Threat Protection (Firewall) Overview and Best Practices White Paper

Symantec Endpoint Protection Manager - Firewall - Policies explained

Ian_C.'s picture


We use NTP with an ALLOW ALL policy. This means we don't block any traffic, but it is still inspected for maliceous content/activity.

For us, we see no difference in performance or server load. Admittedly, we have not taken any measurements with tools on a before & after basis. This is more from talking to users and our own experience.

One issue we had that NTP made worse is ghosted NICs on VMware guests. See this MS article if you want more info:

Please mark the post that best solves your problem as the answer to this thread.
Srikanth_Subra's picture

We previously blocked some traffic in NTP..but now we have allowed all the traffic in Symantec Firewall

Thanks & Regards,


"Defeat the Defeat before the Defeat Defeats you"
(Swami Vivekananda)

pete_4u2002's picture

you need to tune up policy to meet your requirement.