Should port 8139 be open on my firewall?

Port 8139 should only be open with strict firewall rules whitelisting trusted IP addresses. Enable rate limiting and intrusion detection systems.

What transport protocol does port 8139 use?

Port 8139 (Puppet Agent) uses the TCP transport protocol and falls under the System & Infrastructure category.

:8139 (TCP)

Puppet Agent

Q: Is port 8139 (Puppet Agent) dangerous?

Port 8139 is classified as high risk. It is a common target for automated scanning and brute-force attacks. Restrict access to trusted IPs if exposure is necessary.

High Risk

TCP — System & Infrastructure

Port Overview

Port Number 8139

Service Name Puppet Agent

Transport Protocol TCP

Category System & Infrastructure

Security Risk High

Port Range Registered (1024-49151)

What is Port 8139?

Port 8139 is used by the legacy Puppet configuration management agent to receive catalog information from the Puppet master server. Puppet masters push configuration catalogs to agents running on managed nodes via this port. Modern Puppet versions use port 8140 for HTTPS communication, but 8139 appears in older deployments.

TCP System & Infrastructure

Security Considerations

Port 8139 (Puppet Agent) 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.

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