What is the difference between Proxied and DNS Only?

In Cloudflare DNS record, we can either set it to “Proxied” or “DNS” only and there are lot of differences between those settings. Each of them has their own pros and cons as listed below.

Proxied: If the DNS record is changed to Proxied, it will list only CloudFlare IP and if anyone is trying to do a DDOS your site, all the requests will go to CloudFlare rather than your IP directly. The downside of proxied is any custom ports to your site might not work

DNS Only: All the traffic would directly go to your IP and there would be no DDOS protection or an safety net, but you would be able use the custom ports in connection to your IP.