Currently I have a problem on my public hosted Asterisk PBX which is some hackers hacked my PBX and used up all my trunks credit.
One of the solution I can think of is, I want to allow only my public IP to only able to use that trunk.
Anyone have example config that can share?
And also If anyone have a solution to prevent hackers to hack my asterisk PBX would be great.
Thank you in advance