DDoS attacks aren’t as common as they’ve been in the past, thanks to services like CloudFlare, that act as a buffer between a server and a flood of requests. If the server takes too long, it will count as a server timeout, and you’ll get an error code. Sometimes servers are overloaded on purpose during a DDoS (Distributed Denial of Service) attack, but the result is similar. You may even see a “502 service temporarily overloaded” error instead of “bad gateway.” DDoS Attacks There may be too many people making requests of the server simultaneously, so it fails to honor any beyond its capacity. An origin server is a computer that contains the website and listens for requests from users to serve that content. An overloaded origin server is by far the most common reason. The 502 error can happen for various reasons, but most are server-side problems. Bad gateway, bad! Common Causes of the HTTP 502 Error If you want to know more about how it all fits together, read Who Owns the Internet? Web Architecture Explained.Ī “Bad Gateway” then simply means that the gateway device could not retrieve the data you asked for from upstream servers in the network. So are the mega routers that your ISP uses to connect its users to the major trunks of the internet. Your internet router or modem is a gateway device.

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