Is port 101 (NIC Host Name) dangerous?

Port 101 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 101 be open on my firewall?

Port 101 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 101 use?

Port 101 (NIC Host Name) uses the TCP transport protocol and falls under the DNS category.

:101 (TCP)

NIC Host Name

Low 风险

TCP — DNS

端口概览

端口号 101

服务名称 NIC Host Name

传输协议 TCP

类别 DNS

安全风险 Low

端口范围知名端口 (0-1023)

什么是端口 101?

Port 101 was the original ARPANET host name server, providing hostname-to-address lookups via the Network Information Center (NIC) before DNS was invented.

TCP DNS

安全注意事项

端口101（NIC Host Name）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。

NIC Host Name

Embed This Widget

端口概览

什么是端口 101?

安全注意事项

相关端口 — DNS

相关术语