PHP-FPM Default Port 9000 | Socket & Configuration

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🔌 Default Ports

N/A

unix socket

/run/php/php8.3-fpm.sock

9000

tcp

FastCGI (if configured for TCP)

📦 Installation Command

apt install php8.3-fpm php8.3-cli php8.3-common php8.3-mysql php8.3-pgsql php8.3-sqlite3 php8.3-redis php8.3-mbstring php8.3-xml php8.3-curl php8.3-zip php8.3-gd php8.3-intl php8.3-bcmath php8.3-soap php8.3-opcache php8.3-readline

⚙️ Configuration Files

/etc/php/8.3/fpm/php.ini
/etc/php/8.3/fpm/php-fpm.conf
/etc/php/8.3/fpm/pool.d/www.conf
/etc/php/8.3/cli/php.ini

📂 Default Directories

config: /etc/php/8.3
fpm_pool: /etc/php/8.3/fpm/pool.d
logs: /var/log/php8.3-fpm.log
socket: /run/php/php8.3-fpm.sock
session: /var/lib/php/sessions

🔐 Default Credentials

Username:N/A

Password:N/A

💡 Runs as www-data user by default. Pool config controls user.

📌 Dependencies

php8.3-commonphp8.3-opcache

⚠️ Conflicts

N/A (can run multiple PHP versions) Port: Other PHP-FPM versions if using TCP 9000

✅ Works With

nginxapache2mysqlmariadbpostgresqlredis

🛡️ Security Notes

Disable expose_php, set open_basedir, disable dangerous functions (exec, shell_exec, system, passthru), enable opcache, set memory_limit appropriately

❓ Frequently Asked Questions

What port does PHP-FPM use?

PHP-FPM uses port 9000 by default, or Unix socket at /run/php/php-fpm.sock.

Socket vs TCP port for PHP-FPM?

Socket is faster for same-server setup. TCP port is needed when PHP runs on a separate server.

Where is PHP-FPM config?

Main config at /etc/php/{version}/fpm/php-fpm.conf, pool config at pool.d/www.conf.