Is port 623 (IPMI) dangerous?

Port 623 is classified as critical risk and should not be exposed to the public internet. It transmits data without encryption, making it vulnerable to eavesdropping and credential theft.

Should port 623 be open on my firewall?

No, port 623 should not be open to the public internet. Block it at the firewall and use encrypted alternatives such as SSH, SFTP, or HTTPS instead.

What transport protocol does port 623 use?

Port 623 (IPMI) uses the UDP transport protocol and falls under the System & Infrastructure category.

:623 (UDP)

IPMI

Critical Risk

UDP — System & Infrastructure

Port Overview

Port Number 623

Service Name IPMI

Transport Protocol UDP

Category System & Infrastructure

Security Risk Critical

Port Range Well-Known (0-1023)

What is Port 623?

Intelligent Platform Management Interface (IPMI) over LAN, used by Baseboard Management Controllers (BMCs) in servers for out-of-band management and remote power control. Has a long history of critical vulnerabilities including authentication bypass and cipher-zero attacks.

UDP System & Infrastructure Commonly Used

Security Considerations

Port 623 (IPMI) 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.

Related Ports — System & Infrastructure

0 Reserved 1 TCPMUX 2 Management Utility 3 CompressNET 4 Unassigned 5 RJE 6 Unassigned 7 Echo

Related Terms

Bandwidth Latency Packet Loss Ping Throughput ASN