TCP Port 6277

About TCP Port 6277

Port 6277 is not assigned to any service in the IANA Service Names and Port Numbers Registry. Ports in this numerical range can be assigned by IANA but this specific port has no current registration. It is referenced in 1 IDS rule but does not exhibit malware activity indicators in our data.

IDS Rule References

1 IDS / security rule reference TCP port 6277. Treat that number as context, not a danger score. Many detection rules are written against groups of ports rather than one service, web ports especially, so common web alternate ports inherit large counts while genuinely sensitive services can show few rules or none. Presence in IDS rules does not mean traffic on this port is malicious.

Rule categories (top 1): web-application-attack (1).

Sample rule descriptions for TCP port 6277:

• ET WEB_SPECIFIC_APPS Anthropic MCP Inspector Proxy Server-Sent Events (SSE) Unauthenticated Remote Code Execution (CVE-2025-49596)

Data Sources

This information is compiled from: Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range).