Oct 27, 2008 · The following is the list of services and their ports used for Active Directory communication: UDP Port 88 for Kerberos authentication; UDP and TCP Port 135 for domain controllers-to-domain controller and client to domain controller operations. TCP Port 139 and UDP 138 for File Replication Service between domain controllers.

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/443 137: Random Ports : UDP: Check dynamic port range: RPC: TCP: 135: Filestream : 139 & 445. SSIS: TCP: 135: DCOM: WMI: TCP: 135: Used by SSCM, it runs over DCOM (aka Network OLE) when accessing remote data. After initial connection DCOM randomly assigns a port for further communication where some tools may require a TCP port > 1024 (aka TCP high Apr 29, 2020 · Agent/Server communication port - It is a random 5-digit port number set during installation. To determine this port number, check the "Client_LocalServer_Port" parameter in the \PCCSRV\ofcscan.ini file. NetBIOS ports - This uses TCP/UDP port 137, TCP port 139, and TCP port 445. These ports are used when installing clients/agents via Remote

Guaranteed communication over port 137 is the key difference between TCP and UDP. UDP port 137 would not have guaranteed communication in the same way as TCP. Because protocol TCP port 137 was flagged as a virus (colored red) does not mean that a virus is using port 137, but that a Trojan or Virus has used this port in the past to communicate.

Nov 30, 2010 What the heck is going on, udp port 137 - General Astaro v8.03, Tons of packages blocked from my Computer to the internal Lan via the UDP 137. Port 137 is netbios.

Ports 137, 138 and 139 are for NetBIOS, and are not required for the functionality of MSRPC. All the ports used by RPC are as follows: RPC EPM TCP 135 RPC over HTTPS TCP 593 SMB (for named pipes) TCP 445 Ephemeral Range, Dynamic *

NetBIOS: What It Is and How It Works - Lifewire