Default Ports: Key Services & Security Insights

This article will look at various services and the default ports that they use. Multiple services have different ports for HTTP and HTTPS traffic (which is why you might see two below).

What is a Default Port?

A default port is a pre-assigned network communication point for specific services and applications. These ports help standardize communication between devices, making it easier to establish connections and maintain compatibility across a wide range of systems.

Common Default Ports for Various Services

cAdvisor Default Port

cAdvisor, a container monitoring tool, communicates on port 8080 by default.

Cassandra Default Port

Apache Cassandra, a highly scalable and distributed NoSQL database, uses port 9042 for default communication.

DB2 Default Port

IBM’s DB2, a family of data management products, uses port 50000 as its default port.

Elasticsearch Default Port

Elasticsearch, a search and analytics engine, typically operates on port 9200 for HTTP communication and port 9300 for node-to-node communication.

Emby Default Port

Emby, a media server designed to organize and stream your media files, uses port 8096 as its default communication port.

GitLab Default Port

GitLab, a web-based platform for version control and collaboration, operates on port 80 (HTTP) and 443 (HTTPS) by default.

gRPC Default Port

gRPC, a high-performance, open-source universal RPC framework, uses port 50051 as its default port.

iDRAC Default Port

Dell’s Integrated Dell Remote Access Controller (iDRAC) enables remote server management and uses port 623 as its default port.

Jellyfin Default Port

Jellyfin, an open-source alternative to Emby and Plex for media management and streaming, operates on port 8096 by default.

Kafka Default Port

Apache Kafka, a distributed streaming platform, uses port 9092 as its default communication port.

Kubernetes API Default Port

For the Kubernetes API, which manages container orchestration, the default port is 6443.

LDAP Default Port

The Lightweight Directory Access Protocol (LDAP), a protocol for accessing and maintaining distributed directory information services, operates on port 389 (unsecured) and 636 (secured with SSL/TLS) by default.

Mongo Default Port

MongoDB, a popular NoSQL database, communicates on port 27017 by default.

MS SQL Default Port

Microsoft SQL Server uses port 1433 as its default communication port.

Nessus Default Port

Nessus, a widely-used vulnerability scanner, operates on port 8834 by default.

NFS Default Port

Network File System (NFS), a protocol for sharing files over a network, typically uses port 2049 as its default port.

NVR Default Port

Network Video Recorders (NVRs) typically use port 80 (HTTP) and 443 (HTTPS) as their default ports, allowing for easy access and management of your security camera feeds.

Oracle Database Default Port

Oracle Database uses port 1521 as its default communication port.

Pi-hole Default Port

Pi-hole, a network-wide ad blocker, communicates on port 80 (HTTP) and 443 (HTTPS) by default, and uses port 53 for DNS.

Portainer Default Port

Portainer, a lightweight management tool for Docker, operates on port 9000 by default for HTTP and 9443 for HTTPS.

Postgres Default Port

PostgreSQL, an open-source relational database management system, uses port 5432 as its default port.

Prometheus Default Port

Prometheus, a monitoring and alerting toolkit, uses port 9090 as its default communication port.

PSQL Default Port

The PostgreSQL command line interface, PSQL, uses port 5432 as its default communication port.

Radarr Default Port

Radarr, a movie collection and management tool, operates on port 7878 by default.

RADIUS Default Port

RADIUS (Remote Authentication Dial-In User Service), an authentication and accounting protocol, uses ports 1812 and 1813 as their default ports for authentication and accounting, respectively.

RDP Default Port

The Remote Desktop Protocol (RDP) is a Microsoft proprietary protocol that provides remote access to Windows systems. It operates on port 3389 by default.

Redis Default Port

Redis, an in-memory data structure store, uses port 6379 as its default communication port.

RTSP Default Port

The Real-Time Streaming Protocol (RTSP) is used to control audio and video streaming media servers, and it operates on port 554 by default.

SonarQube Default Port

SonarQube, a platform for continuous code quality inspection, uses port 9000 as its default communication port.

Sonarr Default Port

Sonarr, a TV series management tool, operates on port 8989 by default.

SonicWall Default Management Port IP

SonicWall, a network security and firewall provider, uses port 443 (HTTPS) as its default management port.

Splunk Default Port

Splunk, a software platform for searching, monitoring, and analyzing machine-generated data, uses ports 8000 (web interface), 8089 (management), and 9997 (forwarding data) as its default ports.

SQL Server Default Port

Microsoft SQL Server uses port 1433 as its default communication port.

SSL Default Port

The default port for SSL (Secure Sockets Layer), a security protocol for establishing encrypted links between a web server and a browser, is 443.

Synology Default Port

Synology, a company that produces network-attached storage (NAS) devices, uses ports 5000 (HTTP) and 5001 (HTTPS) as their default ports for accessing the web interface.

Syslog Default Port

Syslog, a standard for message logging, uses port 514 as its default communication port.

TFTP Default Port

Trivial File Transfer Protocol (TFTP), a simple file transfer protocol, operates on port 69 by default.

Tomcat Default Port

Apache Tomcat, a web server, and servlet container, uses port 8080 as its default HTTP communication port.

VNC Default Port

Virtual Network Computing (VNC), a graphical desktop sharing system, uses port 5900 as its default communication port.

WireGuard Default Port

WireGuard, a modern VPN (Virtual Private Network) protocol, uses port 51820 as its default communication port.

ZooKeeper Default Port

Apache ZooKeeper, a service for distributed systems coordination, uses port 2181 as its default communication port.

Conclusion: Why Change Default Ports?

While default ports provide a standardized way of communication between devices and services, they can also pose a security risk. Hackers often target default ports, as they are well-known and easily accessible. By changing the default ports, you add an extra layer of security to your systems, making it more difficult for attackers to exploit vulnerabilities.

In some cases, you may also need to change default ports to avoid conflicts between applications or services that use the same default port as well.

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Frank is an IT professional with over 13 years experience and is the creator of WunderTech. He started his home lab in 2018 and is passionate about educating people on NAS, Docker, virtualization, firewalls, and self-hosted apps through his experiences as an avid home lab enthusiast. Frank holds a Bachelor's of Science degree in Computer Information Systems and a Master of Business Administration (MBA).