:555
(TCP/UDP)
High Risk
DSFA
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TCP/UDP — System & Infrastructure
Port Overview
Port Number
555
Service Name
DSFA
Transport Protocol
TCP/UDP
Category
System & Infrastructure
Security Risk
High
Port Range
Well-Known (0-1023)
What is Port 555?
DSFA (Distributed Services Framework Agent). Also historically associated with phAse zero trojan. Sometimes used for testing.
TCP/UDP
System & Infrastructure
Security Considerations
Port 555 (DSFA) 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.