3306
MySQL
High RiskTCP — Database
Port Overview
Port Number
3306
Service Name
MySQL
Transport Protocol
TCP
Category
Database
Security Risk
High
Port Range
Registered (1024-49151)
What is Port 3306?
MySQL and MariaDB database server. The default port for the world's most popular open-source relational database. Should be firewalled from public access.
TCP
Database
Commonly Used
Security Considerations
Port 3306 (MySQL) is classified as high risk. This port is a common target for automated scanning and brute-force attacks. If you must expose it, restrict access to known IP addresses.
Recommendation: Use firewall rules to whitelist trusted IPs. Enable rate limiting and intrusion detection.