Is port 8983 (Apache Solr) dangerous?

Port 8983 is classified as critical risk and should not be exposed to the public internet. It transmits data without encryption, making it vulnerable to eavesdropping and credential theft.

Should port 8983 be open on my firewall?

No, port 8983 should not be open to the public internet. Block it at the firewall and use encrypted alternatives such as SSH, SFTP, or HTTPS instead.

What transport protocol does port 8983 use?

Port 8983 (Apache Solr) uses the TCP transport protocol and falls under the Database category.

:8983 (TCP)

Apache Solr

Critical Risk

TCP — Database

Port Overview

Port Number 8983

Service Name Apache Solr

Transport Protocol TCP

Category Database

Security Risk Critical

Port Range Registered (1024-49151)

What is Port 8983?

Port 8983 is the default HTTP port for Apache Solr, an open-source enterprise search platform built on Apache Lucene. Applications use Solr's REST API on this port to index documents and perform full-text searches. Many Solr data breaches have occurred from publicly exposed instances without authentication, leading to data theft and cryptomining attacks.

TCP Database Commonly Used

Security Considerations

Port 8983 (Apache Solr) is classified as critical risk. This port should not be exposed to the public internet. The service transmits data without encryption, making it vulnerable to eavesdropping, credential theft, and man-in-the-middle attacks.

Recommendation: Block this port at the firewall. Use encrypted alternatives (SSH, SFTP, HTTPS) instead.

Related Ports — Database

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Related Terms

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