GRC | Port Authority, for Internet Port 139
May 27, 2020 UDP 139 - Port Protocol Information and Warning! Side note: UDP port 139 uses the Datagram Protocol, a communications protocol for the Internet network layer, transport layer, and session layer. This protocol when used over PORT 139 makes possible the transmission of a datagram message from one computer to an application running in another computer. How to open ports in Windows Firewall | Windows Central Sep 22, 2017 NetBIOS: What It Is and How It Works - Lifewire
The service uses all the following ports: 135/tcp, 135/udp, 137/udp 138/udp, 139/tcp, 445/tcp. MS Security Bulletin outlines another critical Buffer Overrun RPC vulnerability that can be exploited via ports 135, 139, 445, 593 (or any other specifically configured RPC port). You should filter the above mentioned ports at the firewall level and
SMB V2 Scanning – Newman Business Solutions
If the packet had been destined for port 139 (NetBIOS), it doesn't match any of the rules, and the * rule ultimately denies the packet. You might want to add a deny rule in a situation where you legitimately need to open a wide range of ports, but there are certain ports within the range that you want to deny.
May 31, 2018