| Port No | 137 |
| Service Name | NetBIOS Name Service |
| RFC Doc | 0 |
| Protocol | TCP |
| Description | UDP NetBIOS name query packets are sent to this port, usually of Windows machines but also of any other system running Samba (SMB), to ask the receiving machine to disclose and return its current set of NetBIOS names. |
| Reference Link | Port Information |
| Attack | Yes |
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