12.1.5 Intrusion Prevention Signatures "not available"

I just check status on my sep clients and I see that "IPS Signatures" shows Not available for all servers.

What update file from LUA is for this feature?

All clients are updating via offline LUA server, what is not connected to internet. I have also checked option in LiveUpdate policy that use the default managment server.

I never understand description of the products update from LUA.

Is there any description about Client Updates and Content Updates? I don't need to download 20GB every day.

I need just to update all x64 windows servers and all x64 linux servers...

I found that: https://support.symantec.com/en_US/article.TECH139...

But this is for SEP 11 version and the descriptions of the updates were changed!

Thanks for help.