104
DICOM
Critical RiskTCP — Other
Port Overview
Port Number
104
Service Name
DICOM
Transport Protocol
TCP
Category
Other
Security Risk
Critical
Port Range
Well-Known (0-1023)
What is Port 104?
DICOM (Digital Imaging and Communications in Medicine) is the international standard for medical imaging data exchange, used by CT scanners, MRI machines, PACS systems, and radiology workstations. Exposed DICOM services have been a significant healthcare security issue.
TCP
Other
Commonly Used
Security Considerations
Port 104 (DICOM) 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.