Typically UDP DNS will be for lookups, TCP is used for zone transfers. That doesn't rule out a TCP packet for a lookup based on size, but I don't know what the threshold is for that or if it's a
Apr 13, 2020 GRC | Port Authority, for Internet Port 139 GRC Internet Security Detection System. Port Authority Edition – Internet Vulnerability Profiling by Steve Gibson, Gibson Research Corporation. Fortinet Knowledge Base - View Document
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Mar 31, 2017 · netbios-dgm – 138/tcp # NETBIOS Datagram Service netbios-ssn – 139/tcp # NETBIOS session service microsoft-ds – 445/tcp # if you are using Active Directory.
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2 NetBIOS. Background. Provides services related to OSI session layer; NetBIOS is an API, not a networking protocol; Developed in 1983, used for a bunch of things, but now only known as API providing services for SMB. Port 138 (ポート138) | PORT INDEX - hi-nemos.com NETBIOS-DGM. [NETBIOS-DGM （Network Basic Input Output Datagram service）] 米国IBM（アイビーエム）社の開発した「BIOS（Basic Input Output System : コンピュータ間のデータ共有を実現する仕組み）」に基づくインタフェース NetBIOS にて使用されるプロトコルで、Windowsの「ネットワーク共有サービス」でのネットワーク内コンピュータ一覧の取得などに利用されています（RFC1001、1002参 … Port 138 TCP UDP | netbios-dgm | NETBIOS Datagram Service Port 138 TCP UDP | netbios-dgm | NETBIOS Datagram Service. The Internet Assigned Numbers Authority ("IANA") has the below description on file for port 138 and this is current as of . Previous port 137: Port Transport Layer Keyword Description 138 Direct hosting of SMB over TCP/IP - support.microsoft®.com