Hi Golani,
"Thumbs up" to the advice, above!
One extra note: please be sure that you are using the latest releases of SEP. There are known conditions in which earlier releases of individual SEP 11 clients will go to the default internet-based LiveUpdate servers despite being configureed to go to an internal source.
Here is an article with more information:
SEP clients go to the LiveUpdate server on the Internet despite a LiveUpdate policy from the SEPM to prevent that.
Article:TECH95946 | Created: 2009-01-02 | Updated: 2012-06-01 |
Article URL http://www.symantec.com/docs/TECH95946
Please do update this thread with news if this has fixed the issue for you!