Hello,
In SEP 11.x, You can surely update AV/AS definitions via methods like .jdb file, intelligent updater.
However, to update PTP and NTP definitions, you would have to have Internet and you can download the definitions via direct download or via Liveupdate Administrator.
There is no manual way to update the clients with PTP and NTP definitions.
Any thoughts on migrating to SEP 12.1 RU3? If yes, please take a look at the latest how-to article created by our very own SEP content council team.
Best practices for upgrading to Symantec Endpoint Protection 12.1.x
http://www.symantec.com/business/support/index?page=content&id=TECH163700
Hope that helps!!