> For the complete documentation index, see [llms.txt](https://pentesting.mrw0l05zyn.cl/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pentesting.mrw0l05zyn.cl/escaneo-y-enumeracion/servicios/137-tcp-137-udp-138-udp-139-tcp-netbios.md).

# 137/UDP, 138/UDP, 139/TCP (NetBIOS)

## nmblookup

```shell
nmblookup -A <target>
```

* -A = búsqueda por IP.
* \<target> = objetivo.

## NBTScan

```shell
nbtscan <target>
nbtscan <CIDR>
nbtscan -rv <CIDR>
```

* -r = utiliza el puerto local 137 para el escaneo (Microsoft Windows 95 responden solo a esto).&#x20;
* -v = modo verboso.
* \<target> = objetivo.
* \<CIDR> = Classless Inter-Domain Routing.