What is port UDP 137 used for?
What is port UDP 137 used for?
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 is the port number 137?
Service Name and Transport Protocol Port Number Registry
| Service Name | Port Number | Description |
|---|---|---|
| netbios-ns | 137 | NETBIOS Name Service |
| netbios-ns | 137 | NETBIOS Name Service |
| trim | 1137 | TRIM Workgroup Service |
| trim | 1137 | TRIM Workgroup Service |
What is the protocol for port 137?
Side note: UDP port 137 uses the Datagram Protocol, a communications protocol for the Internet network layer, transport layer, and session layer. This protocol when used over PORT 137 makes possible the transmission of a datagram message from one computer to an application running in another computer.
Which protocol usually listens on ports in the 137 139 range?
Common Internet File Service (CIFS) is the successor to the server message block (SMB) protocol. CIFS is the primary protocol used by Windows systems for file sharing. CIFS uses UDP ports 137 and 138, and TCP ports 139 and 445.
Should I disable port 139?
Port 139 is utilized by NetBIOS Session 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. Therefore it is advisable to block port 139 in the Firewall.
Should I disable port 135?
Disabling TCP port 135 will NOT affect Local DCOM/Raw RPC server component because they do not need network. Disabling TCP port 135 will only affect some client machine which directly use DCOM remote activation (i.e. VB CreateObject(“Excel.