Tag Directory

#502 bad gateway Solutions

Browse all server troubleshooting guides and configuration walkthroughs tagged with #502 bad gateway.

🏷️ 4 Tagged Solutions 👨‍💻 Reviewed by Johnathon Wheeler

Intermediate Web Servers

Fixing Nginx 502 Bad Gateway with PHP-FPM Unix Socket & TCP Pools (Ubuntu, Debian, Alpine, WSL2)

Comprehensive troubleshooting guide for connect() to unix:/var/run/php/php-fpm.sock failed (111: Connection refused). Learn root causes, system traces, and verified resolutions.

#502 bad gateway #fastcgi #nginx #permissions #php-fpm #sysadmin #unix-socket

💻 Ubuntu 24.04/22.04 LTS, Debian 12, Alpine Linux 3.19, WSL2 Solve →

Intermediate Web Server

Nginx Worker Process Permissions Denied Opening Unix Socket on WSL2 Ubuntu

Troubleshoot 'permissions denied' when Nginx worker processes fail to open a Unix socket on Windows WSL2 Ubuntu. Fix PHP-FPM and directory permissions.

#502 bad gateway #nginx #permissions #php-fpm #ubuntu #unix-socket #wsl2

💻 Windows WSL2 Ubuntu (20.04 LTS+, Nginx 1.18+, PHP-FPM 7.4+) Solve →

Advanced Web Server

Resolving Nginx FastCGI Buffer Size Exceeded: Response Header Too Large on Debian 12 Bookworm

Fix the 'FastCGI buffer size exceeded' error on Nginx with PHP-FPM on Debian 12. Adjust Nginx and PHP-FPM buffer settings for large HTTP headers.

#502 bad gateway #debian12 #fastcgi #http headers #nginx #php-fpm #troubleshooting #webserver

💻 Debian 12 Bookworm, Nginx 1.22+, PHP-FPM 8.2+ Solve →

Intermediate Runtimes

Fixing PHP-FPM Socket Permission Denied: Nginx User/Group Mismatch on Ubuntu 22.04 LTS

Resolve Nginx 502 Bad Gateway errors caused by PHP-FPM Unix socket permission issues on Ubuntu 22.04 LTS by correcting user, group, and listen mode configurations.

#502 bad gateway #nginx #permissions #php-fpm #ubuntu-22.04 #unix-socket

💻 Ubuntu 22.04 LTS, Nginx 1.22+, PHP-FPM 8.1+ Solve →