Why connect to UDP 137? [Resolved] - General Security
Allows inbound file and printer sharing. To do this, Windows Firewall opens UDP ports 137 and 138, and TCP ports 139 and 445. If you enable this policy setting, Windows Firewall opens these ports so that this computer can receive print jobs and requests for access to shared files. You must specify the IP addresses or subnets from which these incoming messages are allowed. List of TCP and UDP port numbers - Wikipedia The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the well-known ports. How to Check Open TCP/IP Ports in Windows Jul 03, 2017
Dec 01, 2012 · UDP port 137 should not connect to a external address normally. The port is used by NETBios. Which is used for File and Printer Sharing, and Domain server traffic. Check your firewall rules. Normally this should not be allowed, unless someone made a firewall rule that explicitly allows this. I am not familiar with remote access tools.
System.exe and Port 137 - Anti-Virus, Anti-Malware, and
You can configure Microsoft Windows products to use a specific port. For more information, see your Microsoft Windows documentation. 137: Windows NetBIOS name service :
Windows Firewall Ports and Exceptions – Support Windows Firewall: Allow inbound file and printer sharing exception This setting opens UDP ports 137 and 138, and TCP ports 139 and 445. This is required for the IPC$ and ADMIN$ shares to be available. Administrative access to these shares is required.
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