Feb 09, 2017
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. Unlike the Internet Protocol (IP), NetBEUI does not have the concept of "ports". So Microsoft grabbed a trio of three successive Internet ports 137, 138, and 139, to use for the transport of their existing NetBIOS protocol over IP-based LAN and WAN networks. The horrors of insecurity resulting from Microsoft's exposure of their NetBIOS protocol NetBIOS is a protocol used for File and Print Sharing under all current versions of Windows. While this in itself is not a problem, the way that the protocol is implemented can be. There are a number of vulnerabilities associated with leaving this port open. NetBios services: NETBIOS Name Service (TCP/UDP: 137) NETBIOS Datagram Service (TCP/UDP Frequently, the 16th octet, called the NetBIOS Suffix, designates the type of resource, and can be used to tell other applications what type of services the system offers. In NBT, the name service operates on UDP port 137 (TCP port 137 can also be used, but rarely is). The name service primitives offered by NetBIOS are: May 01, 2020 · NetBIOS, an abbreviation for Network Basic Input/Output System, is a networking industry standard. It was created in 1983 by Sytek and is often used with the NetBIOS over TCP/IP protocol. However, it's also used in Token Ring networks, as well as by Microsoft Windows. Jan 28, 2020 · Ports Used by All Nodes; Cisco ISE Service . Ports on Gigabit Ethernet 0 or Bond 0. Ports on Other Ethernet Interfaces (Gigbit Ethernet 1 through 5, or Bond 1 and 2) Replication and Synchronization . HTTPS (SOAP): TCP/443
Sep 12, 2014 · If the source computer uses NetBIOS, port 445 is not required. If NetBIOS is not being used, ports 137, 138, and 139 are not required. If in doubt, make sure that none of the ports are blocked.
Nov 28, 2018 The use of TCP ports 139 and 445 in Windows May 15, 2019
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What is NetBIOS? Characteristics of NetBIOS - Stemjar