4222
NATS Messaging
Medium RiskTCP — Messaging
Port Overview
Port Number
4222
Service Name
NATS Messaging
Transport Protocol
TCP
Category
Messaging
Security Risk
Medium
Port Range
Registered (1024-49151)
What is Port 4222?
Port 4222 is the default client connection port for NATS, a high-performance open-source messaging system designed for cloud-native applications and microservices. NATS provides publish-subscribe, request-reply, and queue messaging patterns. It is widely used in cloud-native architectures as a lightweight alternative to Kafka and RabbitMQ.
TCP
Messaging
Commonly Used
Security Considerations
Port 4222 (NATS Messaging) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.
Recommendation: Keep the service updated. Monitor logs for unusual activity.