Is port 550 (new-rwho) dangerous?

Port 550 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 550 be open on my firewall?

Port 550 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

Port 550 (new-rwho) uses the UDP transport protocol and falls under the System & Infrastructure category.

:550 (UDP)

Medium 风险

UDP — System & Infrastructure

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端口号 550

服务名称 new-rwho

传输协议 UDP

类别 System & Infrastructure

安全风险 Medium

端口范围知名端口 (0-1023)

Port 550 is assigned to new-rwho, broadcasting info about logged-in users across Unix networks. Privacy risk; effectively obsolete.

UDP System & Infrastructure

端口550（new-rwho）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。