Hi,
As far as I know you have to do the following :
The detector engine can be downloaded from NSM. To download the latest detector engine and also the signature updates, go to Tools > View/Update NSM Attack Database.
You can push the detector engine to the device
- Go to Devices > IDP Detector Engine > Load IDP Detector Engine; this will update the device with the latest detector engine.
You need to update / push the policy again to the device after loading the new detector engine
- when the new detector engine is pushed to the device, remember to update the policy on the ISG-IDP/Standalone IDP.
Pushing a new policy to the IDP device will update only the attack signatures, not the detector version.
More info :
https://kb.juniper.net/InfoCenter/index?page=content&id=KB9773
and here :
https://kb.juniper.net/InfoCenter/index?page=content&id=KB9769
Hope this helps a bit