Is port 191 (Prospero) dangerous?

Port 191 is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose with standard security practices.

Should port 191 be open on my firewall?

Port 191 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 191 use?

Port 191 (Prospero) uses the TCP/UDP transport protocol and falls under the File Transfer category.

:191 (TCP/UDP)

Prospero

Low 风险

TCP/UDP — File Transfer

端口概览

端口号 191

服务名称 Prospero

传输协议 TCP/UDP

类别 File Transfer

安全风险 Low

端口范围知名端口 (0-1023)

什么是端口 191?

The Prospero Directory Service was a distributed filesystem and resource location protocol from the early 1990s. Completely obsolete.

TCP/UDP File Transfer

安全注意事项

端口191（Prospero）被归类为低风险。该服务使用加密或攻击面极小，相对安全可以暴露。

建议：应用标准安全实践。保持软件更新并监控访问。

Prospero

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端口概览

什么是端口 191?

安全注意事项

相关端口 — File Transfer

相关术语