2404
IEC 60870-5-104
Critical RiskTCP — System & Infrastructure
Port Overview
Port Number
2404
Service Name
IEC 60870-5-104
Transport Protocol
TCP
Category
System & Infrastructure
Security Risk
Critical
Port Range
Registered (1024-49151)
What is Port 2404?
Port 2404 is used by IEC 60870-5-104, a standard protocol for telecontrol equipment in electrical power systems and SCADA infrastructure. Utility companies use this protocol to monitor and control remote electrical substations and power equipment. Security of this port is critical for protecting power grid infrastructure from cyberattacks.
TCP
System & Infrastructure
Security Considerations
Port 2404 (IEC 60870-5-104) is classified as critical risk. This port should not be exposed to the public internet. The service transmits data without encryption, making it vulnerable to eavesdropping, credential theft, and man-in-the-middle attacks.
Recommendation: Block this port at the firewall. Use encrypted alternatives (SSH, SFTP, HTTPS) instead.