Making Asterisk Accessable over internet

Hello ,
I’m an asterisk newbie, and have created a basic VOIP PBX on my local network ,Now i want it to be accessible over the internet. Can anyone guide me about the required config and requirements??

Check out the NAT settings in the PJSIP settings. You need to port forward the SIP ports and the RTP ports that you will be using (see rtp.conf). Lastly make sure you read the security settings. Expect anyone and everyone try to register with your PBX and compromise it.