Should port 8042 be open on my firewall?

Port 8042 should only be open with strict firewall rules whitelisting trusted IP addresses. Enable rate limiting and intrusion detection systems.

What transport protocol does port 8042 use?

Port 8042 (YARN NodeManager) uses the TCP transport protocol and falls under the Other category.

:8042 (TCP)

YARN NodeManager

Q: Is port 8042 (YARN NodeManager) dangerous?

Port 8042 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 — Other

Port Overview

Port Number 8042

Service Name YARN NodeManager

Transport Protocol TCP

Category Other

Security Risk High

Port Range Registered (1024-49151)

What is Port 8042?

Port 8042 is the default port for the Apache Hadoop YARN NodeManager web interface. NodeManagers run on each worker node in a Hadoop cluster to manage containers and report resource usage to the ResourceManager. The web UI on this port shows running containers, logs, and node health information.

TCP Other

Security Considerations

Port 8042 (YARN NodeManager) 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 — Other

35 Private Printer Server 43 WHOIS 63 Whois++ 75 Private Dial-Out Service 78 VetTCP 91 MIT-DOV 92 NPP 104 DICOM

Related Terms

ASN BGP Hijack Data Center Domain Name Dual Stack Internet Exchange Point (IXP)