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~/ports / 9000

Port 9000: PHP-FPM and FastCGI

Port 9000 is the usual TCP port of PHP-FPM for FastCGI requests from the web server.

Port
9000
Protocol
TCP
Service
PHP-FPM (FastCGI)
Exposure
Public: no, localhost only
daniele@mikweb: ~/ports — less 9000.md

In many setups, especially Docker images, PHP-FPM listens on 127.0.0.1:9000; nginx passes PHP requests via fastcgi_pass. Debian/Ubuntu use a Unix socket such as /run/php/php8.3-fpm.sock instead. Portainer, MinIO and SonarQube also like port 9000 – conflicts are common.

Never public. An exposed FastCGI port allows arbitrary PHP execution, e.g. via crafted PHP_VALUE parameters. Localhost or the internal Docker network only.

Typical: 502 Bad Gateway because FPM is down, listens on another port, or has hit pm.max_children (see the FPM log).

Check

SCRIPT_NAME=/status SCRIPT_FILENAME=/status REQUEST_METHOD=GET cgi-fcgi -bind -connect 127.0.0.1:9000
daniele@mikweb: ~/ports — ls

Ports

80/TCPHTTP443/TCP/UDPHTTPS / HTTP/38080/TCPHTTP alternate

← All ports