// REFERENCE
Port 3000 (dev apps)
Protocol: TCP
Service: Dev HTTP
Medium risk
The de facto port of many dev servers (Node/React, Rails, Grafana). Usually a local app; if it shows up exposed, check it isn't an unprotected staging environment.
Related tools
Work with this in:
Related
80
Port 80 (HTTP) 443
Port 443 (HTTPS) 1080
Port 1080 (SOCKS proxy) 2082
Port 2082 (cPanel) 2083
Port 2083 (cPanel TLS) 3128
Port 3128 (Squid proxy)
Port 80 (HTTP) 443
Port 443 (HTTPS) 1080
Port 1080 (SOCKS proxy) 2082
Port 2082 (cPanel) 2083
Port 2083 (cPanel TLS) 3128
Port 3128 (Squid proxy)
Assignments per the IANA port registry. Educational content.