Phones on my network are being spam called by an IP address

People on my phone network has been getting spam called by a local IP address and a number call “277277277277277277” in my freepbx system. Is there a way to stop this from happening? here are some screenshots.
image
https://drive.google.com/file/d/1T-ysd0BAL54CBX2p2YznwxbLk7KWPGBi/view?usp=sharing)

Fix your firewall, they are scanning your network for open SIP ports and sending calls to it.

If you don’t listen for SIP on UDP:5060 they will likely go away.

you want me to enable the firewall?

You don’t have the firewall enabled on a publicly facing system?

i enabled firewall and now everyone outside my network has their phones not working