What causes "405 Not Allowed" in nginx/nginx?

405 Not Allowed

Error message

405 Not Allowed

What it means

Error "405 Not Allowed" thrown in nginx/nginx.

Source

Thrown at src/http/ngx_http_special_response.c:140


static char ngx_http_error_403_page[] =
"<html>" CRLF
"<head><title>403 Forbidden</title></head>" CRLF
"<body>" CRLF
"<center><h1>403 Forbidden</h1></center>" CRLF
;


static char ngx_http_error_404_page[] =
"<html>" CRLF
"<head><title>404 Not Found</title></head>" CRLF
"<body>" CRLF
"<center><h1>404 Not Found</h1></center>" CRLF
;


static char ngx_http_error_405_page[] =
"<html>" CRLF
"<head><title>405 Not Allowed</title></head>" CRLF
"<body>" CRLF
"<center><h1>405 Not Allowed</h1></center>" CRLF
;


static char ngx_http_error_406_page[] =
"<html>" CRLF
"<head><title>406 Not Acceptable</title></head>" CRLF
"<body>" CRLF
"<center><h1>406 Not Acceptable</h1></center>" CRLF
;


static char ngx_http_error_407_page[] =
"<html>" CRLF
"<head><title>407 Proxy Authentication Required</title></head>" CRLF

View on GitHub (pinned to 3f6f7824d4)

When it happens

Trigger: Thrown at src/http/ngx_http_special_response.c:140 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of nginx/nginx@3f6f7824d4 (2026-08-22). Data as JSON: /api/errors/19dfe68633a9ddd0. Report an issue: GitHub.