How to do this ? I beliece that I have selected my Laptop in the office as the unmanaged detector, but in the VLAN that is only for my workstation.

DO I have to select one server as unmanaged detector in each VLAN or is there any script for me to do this to query any workstation/server with no AV installed ?

Yes you can configure

Unmanaged Detector in SEP 12.1

https://www-secure.symantec.com/connect/articles/unmanaged-detector-sep-121

SEP 12.1 - What does it mean to set a client as an Unmanaged Detector?

http://www.symantec.com/business/support/index?page=content&id=TECH183746

Check this thread

How to Find SEP Clients that are designated as Unmanaged Detectors

https://www-secure.symantec.com/connect/forums/how-find-sep-clients-are-designated-unmanaged-detectors

https://www-secure.symantec.com/connect/forums/symantec-endpoint-protection-121-and-find-unmanaged-computers

https://www-secure.symantec.com/connect/forums/sep-121-unmanaged-detector-fixed-limited-admins

yep, check these links

What does it mean to set a client as an Unmanaged Detector?

http://www.symantec.com/docs/TECH105722

Find Unmanaged Clients on a remote network location using the Unmanaged Detector

http://www.symantec.com/docs/TECH96234

Setting notifications when using the "Unmanaged Detector" feature in the SEPM

http://www.symantec.com/docs/TECH104897

Is there any rule or caveats when I select any server in the production VLAN as the unmanaged detector ?

I wonder if the unmanaged detector server can actually forward any findings into the SEPM server across the zones (eg. between DMZ and internal zone )?

Hi,

You can find unmanaged detector Specify VLAN base or any of server as a unmanaged Detector.

Unmanaged Detector in SEP 12.1

https://www-secure.symantec.com/connect/articles/unmanaged-detector-sep-121

What does it mean to set a client as an Unmanaged Detector?

http://www.symantec.com/business/support/index?page=content&id=TECH105722

The unmanaged detector need to have NTP component installed to work. Also, you need an unmanaged detector on every subnet unless you configure your routing in a special way. And it will pick up every device unless you set exceptions.You will see routers, switches, etc. in the report as well.

Hi,

I believe it's a firewall componenet.

Check the following note:

Reference:http://www.symantec.com/business/support/index?page=content&id=TECH105722

NOTE: In order to act as an unmanaged detector, SEP clients must have Network Threat Protection (NTP) enabled and be in Computer Mode. User Mode clients or clients without the firewall component (NTP) cannot act as unmanaged detectors.