All Extension in use

[qatar2022]

Dear all
I set up ucm6301 and everything work great BUT I notes that some times all Extension at the seam time in use
any command on this issue

[damiano70]

• when the event occurs, what do you see in System Status -> Active Calls?
• are you using UCM with latest FW?
• have you opened any NATs not in ACL?

[qatar2022]

I see nothing on active calls.
yes withe latest FW
No

But yesterday at 4.45AM I get call to my bedroom from dining room, and nobody was in my home expect me

[damiano70]

I think the solution is if you put the NATs in ACLs, you are currently exposing UCM to the whole world, therefore with serious security problems