How to Fix "Nginx Rewrite Rule Causing Infinite Redirect Loop"
A rewrite rule meant to redirect a URL ends up redirecting the browser back to itself over and over, until the browser gives up with a "too many redirects"...
Category
Nginx
Fixes for reverse proxy errors, SSL configuration, and caching issues in Nginx.
How to Resolve "Nginx Upstream Sent Too Big Header While Reading Response Header"
Nginx rejects a response from your backend because its headers exceed the buffer size Nginx allocated to read them. This is common with large cookies...
Nginx 500 Internal Server Error Without Any Error Log Output
A 500 error with nothing showing up in Nginx's error log doesn't mean Nginx has no idea what happened — it usually means either the log level is set too...
Nginx alias vs root Directive Causing 404 on Static Files
root and alias both map a request path to a filesystem location, but they combine the matched location path with the filesystem path differently — mixing up...
Nginx gRPC Reverse Proxy Returning HTTP 502 or HTTP 405 Error
Proxying gRPC traffic through Nginx requires specific configuration distinct from regular HTTP proxying — a 405 typically means Nginx is treating the request...
Nginx Subfolder Redirect Losing Query String Parameters
A redirect that drops query string parameters happens because Nginx doesn't automatically forward them to the redirect target — unlike some other systems where...
Nginx "Upstream Timed Out While Reading Response Header From Upstream"
This error means Nginx gave up waiting for your backend to respond within the configured timeout window — the fix depends on determining whether the backend is...
Nginx 503 Service Temporarily Unavailable Under High Traffic Load
A 503 specifically appearing under high traffic load, rather than consistently, means Nginx (or the application behind it) is running out of capacity to handle...
Nginx Rate Limiting Blocking Legitimate API Users Behind Cloudflare IP
When Nginx rate limiting seems to block far more legitimate traffic than expected, especially many different users seemingly all hitting the limit...