Why is udp port 137 being used during a remote desktop

Microsoft SMB, SMB2, NetBIOS, WINS protocol suite Now mostly NetBIOS over TCP/IP (NBT). (NetBIOS is now used as synonym for NBT) Nodes have a NetBIOS name and an IP address. NetBIOS over TCP/IP services. Standardized in. RFC 1001; RFC 1002; Provides: + Name Service (Port 137/UDP) + Datagram Service (Port 138/UDP) + Session Service (Port 139/TCP) SMB runs on top of NetBIOS How to detect and defend against a TCP port 445 exploit What is port 445, and what is it used for? Along with ports 135, 137 and 139, port 445 is a traditional Microsoft networking port with tie-ins to the original NetBIOS service found in earlier Domain controllers required ports: Use PowerShell to check

Apr 28, 2020

12 rows UDP 137 - Port Protocol Information and Warning! 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. GRC | Port Authority, for Internet Port 137

How to Close Unused Open Ports: TCP and UDP Port Scan

Jun 05, 2006 · Ports 137-139 are NetBios ports which are used for file and printer sharing across a LAN. So if you are behind a router, trust your network, and need to share files or printers, then they should be open. As we can see from the example the TCP 445 is open and listening mode which means this system will accept connections to the 445 port. SMB Over Netbios. Actually Netbios protocol works in TCP 139 and UDP 137 and UDP 138. So if we have a secure network that prevents access to the remote hosts we should add firewall allow TCP and UDP 137-139 rule. By default, the HTTP port that's used for client-to-site system communication is port 80, and the default HTTPS port is 443. Ports for client-to-site system communication over HTTP or HTTPS can be changed during setup or in the site properties for your Configuration Manager site. UDP port 137 (name services) UDP port 138 (datagram services) TCP port 139 (session services) NetBIOS over TCP/IP is specified by RFC 1001 and RFC 1002. The Netbt.sys driver is a kernel -mode component that supports the TDI interface.