Master Ports List v1 — Comprehensive Port & Protocol Reference
The Master Ports List v1 is a fully consolidated, security-focused catalog of the most important ports and protocols used across modern IT, networking, cybersecurity, cloud platforms, MSP/MSSP operations, and enterprise infrastructure. This list brings together well-known, registered, and high-risk ports into a single, structured reference designed for engineers, analysts, technicians, SOC teams, and architects who need fast, accurate lookup data during troubleshooting, solution design, audits, and security assessments.
Port usage is one of the foundational elements of network communication. Understanding which services run on which ports — and which of those ports introduce operational or security risk — is essential for:
- Designing secure network architectures
- Hardening servers and endpoints
- Conducting vulnerability assessments
- Supporting RMM and remote-access platforms
- Maintaining compliance requirements
- Responding to threats and incidents
- Building MSP/MSSP operations and onboarding workflows
Master Ports List v1 includes entries for traditional technologies, cloud-native platforms, legacy systems, remote-access tools, RMM agents, AV/EDR/XDR security platforms, VoIP, identity services, databases, monitoring protocols, and attack-prone ports frequently targeted by ransomware, botnets, or automated exploitation frameworks.
Each entry includes:
- Service – The application, protocol, or function associated with the port
- Port Number / Range – Well-known or vendor-specific
- Protocol – TCP, UDP, or dual transport
- Direction – Inbound/Outbound expectations
- Notes / Risks / Use Cases – Operational context, security flags, or vendor behavior
This version of the master list reflects the most widely used ports encountered across:
- Enterprise networks
- Hybrid cloud and on-prem infrastructure
- MSP/MSSP remote management tools
- SOC/XDR environments
- Network monitoring stacks
- Zero Trust and identity systems
- VoIP and real-time communications
- Legacy systems still found in production environments
Designed as both a practical daily reference and a training resource, Master Ports List v1 helps engineers quickly identify:
- Which ports must be allowed for agents, remote access, backups, and patching
- Which ports should be blocked, restricted, or monitored
- Which legacy or high-risk ports require compensating controls
- Which services are commonly exploited by attackers
- Which cloud and SaaS services require outbound connectivity
Whether you’re performing a firewall review, configuring an RMM deployment, onboarding a new customer environment, conducting a pen test, or validating security posture, this list provides the clarity and structure needed to make informed decisions quickly.