How do I resolve 502 errors on websites protected by Anti-DDoS IP?

Problem description

After you configure YiSu Cloud Anti-DDoS IP, an error message is displayed when you access the website 502.

Causes and Solutions

1. Back-to-origin IP addresses of an Anti-DDoS IP instance are blocked or subject to throttling
   All back-to-origin IP addresses of Anti-DDoS IP are allowed on the origin site to resolve 502 errors.

2. Network congestion or jitter occurs.
   Accidental local network jitter, operator line failure and other factors may also lead to 502 errors. You can submit a ticket to provide information about link quality monitoring.