515
LPD
High RiskTCP — System & Infrastructure
Port Overview
Port Number
515
Service Name
LPD
Transport Protocol
TCP
Category
System & Infrastructure
Security Risk
High
Port Range
Well-Known (0-1023)
What is Port 515?
Port 515 is assigned to LPD/LPR (Line Printer Daemon), the traditional Unix printing protocol defined in RFC 1179. Still widely supported by network printers. No authentication.
TCP
System & Infrastructure
Commonly Used
Security Considerations
Port 515 (LPD) 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.