What port is NetBIOS DGM?
138
Service Name and Transport Protocol Port Number Registry
| Service Name | Port Number | Description |
|---|---|---|
| netbios-dgm | 138 | NETBIOS Datagram Service |
| netbios-ssn | 139 | NETBIOS Session Service |
| netbios-ssn | 139 | NETBIOS Session Service |
| imap | 143 | Internet Message Access Protocol |
What is the protocol for port 137?
NetBIOS Name service
Inbound connection in port 137 (UDP) is not blocked in Windows firewall. Port 137 is utilized by NetBIOS Name service. Enabling NetBIOS services provide access to shared resources like files and printers not only to your network computers but also to anyone across the internet.
What protocol service uses port 156?
Service Name and Transport Protocol Port Number Registry
| Service Name | Port Number | Transport Protocol |
|---|---|---|
| sqlsrv | 156 | udp |
| knet-cmp | 157 | tcp |
| knet-cmp | 157 | udp |
| pcmail-srv | 158 | tcp |
What is NetBIOS SSN?
NetBIOS Session Service (NBSS) is a protocol to connect two computers to transmit heavy data traffic. It is mostly used for printer and file services over a network.
What is NetBIOS Name Service?
Description. The NetBIOS Name Service (NBNS) is part of the NetBIOS-over-TCP/IP (NBT/NetBT) protocol suite that allows legacy computer applications relying on the NetBIOS Application Programming Interface (API) to be used on TCP/IP networks.
Is NetBIOS name still used?
NetBIOS (Network Basic Input/Output System) was created in the early 1980’s, but is surprisingly still alive and well on many networks today. Microsoft Windows still uses it for its name resolution function (often by default), when DNS is not available.
How long can a NetBIOS name be?
In Windows, the NetBIOS name is separate from the computer name and can be up to 16 characters long. Applications on other computers access NetBIOS names over UDP, a simple OSI transport layer protocol for client/server network applications based on Internet Protocol (IP), via port 137 (in NBT).
Can I create a NetBIOS Naming server that is not a WINS server?
Technically, you could create a NetBIOS naming server that is not a WINS server, but it is rarely done. The NetBIOS naming server standard is an open standard controlled by RFC 1001 and RFC 1002. Each computer contacts the WINS server upon startup and provides the computer’s IP address, as well as its name.
What does the last octet of a NetBIOS Suffix mean?
The last octet is usually the NetBIOS Suffix that explains which services the system has available. The Windows Internet Naming Service provides name resolution services for NetBIOS. Two applications start a NetBIOS session when the client sends a command to “call” another client (the server) over TCP port 139.
Does NetBIOS support IPv6 name registration?
Registering the NetBIOS name is required by the application but is not supported by Microsoft for IPv6. The last octet is usually the NetBIOS Suffix that explains which services the system has available. The Windows Internet Naming Service (WINS)provides name resolution services for NetBIOS.