Is port 137 (NetBIOS Name) dangerous?

Port 137 is classified as high risk. It is a common target for automated scanning and brute-force attacks. Restrict access to trusted IPs if exposure is necessary.

Should port 137 be open on my firewall?

Port 137 should only be open with strict firewall rules whitelisting trusted IP addresses. Enable rate limiting and intrusion detection systems.

What transport protocol does port 137 use?

Port 137 (NetBIOS Name) uses the UDP transport protocol and falls under the System & Infrastructure category.

:137 (UDP)

NetBIOS Name

High 风险

UDP — System & Infrastructure

端口概览

端口号 137

服务名称 NetBIOS Name

传输协议 UDP

类别 System & Infrastructure

安全风险 High

端口范围知名端口 (0-1023)

什么是端口 137?

NetBIOS Name Service. Resolves NetBIOS names to IP addresses on local networks. Part of the legacy Windows networking stack and a frequent attack vector.

UDP System & Infrastructure 常用

安全注意事项

端口137（NetBIOS Name）被归类为高风险。此端口是自动扫描和暴力破解攻击的常见目标。如必须暴露，请将访问限制为已知IP地址。

建议：使用防火墙规则将可信IP列入白名单。启用速率限制和入侵检测。

NetBIOS Name

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端口概览

什么是端口 137?

安全注意事项

相关端口 — System & Infrastructure

相关术语