TCP Port 9100 – hp-pdl-datastr
About TCP Port 9100
The Internet Assigned Numbers Authority (IANA) registers port 9100 for hp-pdl-datastr. The IANA description reads: ‘PDL Data Streaming Port’. This port is referenced in 4 IDS rules and exhibits low malware activity in monitored traffic.
IDS Rule References
4 IDS / security rules reference TCP port 9100. Treat that number as context, not a danger score. Many detection rules are written against groups of ports rather than one service, web ports especially, so common web alternate ports inherit large counts while genuinely sensitive services can show few rules or none. Presence in IDS rules does not mean traffic on this port is malicious.
Rule categories (top 3): command-and-control (2), attempted-admin (1), misc-activity (1).
Sample rule descriptions for TCP port 9100:
- POLICY-OTHER HP JetDirect LCD modification attempt
- ET MALWARE Win32/Recslurp.D C2 Request (no alert)
- ET MALWARE Win32/Recslurp.D C2 Response
- ET EXPLOIT HP Printer Attempted Path Traversal via PJL
Malware Rule References
A small share of the IDS rules that reference this port are malware related.
2 of the 4 IDS rules that reference TCP port 9100 are malware related. That describes detection coverage across the whole internet, not anything about your machine or your network.
Families observed (top 1): Win32_Recslurp_D (2).
Data Sources
This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry, Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range), and Snort Community Rules (GPLv2).