How to protect yourself from asterisk spam?

Question

Asterisk

There is freepbx and asterisk, I can't work with asterisk, because this is -
https://skr.sh/v7vWgDBKXwU?a

Please help me solve this problem, or show an article with which you personally dealt with a similar problem.

Answer 1

Fail2Ban will help protect against such spam - and at the same time from bruteforce attacks .