Is port 1 (TCPMUX) dangerous?

Port 1 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 1 be open on my firewall?

Port 1 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

Port 1 (TCPMUX) uses the TCP transport protocol and falls under the System & Infrastructure category.

:1 (TCP)

Medium 风险

TCP — System & Infrastructure

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端口号 1

服务名称 TCPMUX

传输协议 TCP

类别 System & Infrastructure

安全风险 Medium

端口范围知名端口 (0-1023)

TCP Port Service Multiplexer. Allows multiple services to share a single well-known port by routing connections based on the requested service name.

TCP System & Infrastructure

端口1（TCPMUX）被归类为中等风险。虽然此服务通常会暴露，但请在可用时考虑使用加密替代方案。

建议：保持服务更新。监控日志以发现异常活动。