Port Destination Purpose; Active Directory. TCP. 88. Active Directory forest. Kerberos V authentication. TCP. 139. Active Directory forest. NetBIOS service session. TCP. 389. Active Directory forest. LDAP. TCP. 445. Active Directory forest. Microsoft SMB/CIFS over TCP with NetBIOS framing. TCP. 464. Active Directory forest. Kerberos V change

May 01, 2020 What is NetBIOS? Does Windows need its ports 137 and 138 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. Services such as workstation and server use the TDI interface directly, NetBIOS - The Wireshark Wiki NetBIOS over TCP/IP (also called NBT) seems to slowly supersede all the other NetBIOS variants. NBT provides three services: NetBIOS Name Service: /NBNS on UDP (or TCP) port 137 (similar to DNS and also known as WINS on Windows) NetBIOS Datagram Service: /NBDS on UDP port 138, rarely used . NetBIOS Session Service: /NBSS on TCP port 139 . History What is NetBIOS (Network Basic Input/Output System)? Nov 13, 2018

NetBIOS is standardized with the RFC 1001 and RFC 1002 in order to run on TCP/UDP protocols which is simply an emulation. NetBIOS can work over TCP/IP port number 139. The client and server both use the TCP port 139 in order to call each other. Both sides can send and receive commands by …

Since NetBIOS is a broadcast traffic on UDP port 137, an address object needs to be configured for the broadcast IP address 255.255.255.255. Select Network | Address Objects and add a new address object. Name: NetBIOS; Zone Assignment: LAN; Type: Host; IP Assignment: 255.255.255.255; Adding broadcast address to SSLVPN services group Angry IP Scanner - NetBIOS

Port 137 (tcp/udp) :: SpeedGuide

NetBIOS defines a software interface and a naming convention. It does not define a protocol. NetBIOS over TCP/IP provides the NetBIOS programming interface over the TCP/IP protocol. It extends the reach of NetBIOS client and server programs to the wide area network (WAN). It also provides interoperability with various other operating systems. But with Windows 2000 and beyond, Microsoft has moved their NetBIOS services over to port 445 — and, perhaps not surprisingly, created an entire next-generation of even more serious security problems with that port. See the port 445 page for details. RFC's The NetBIOS over IP protocols are described in a pair of consecutive Internet RFC SMB ports are generally port numbers 139 and 445. Port 139: Used by SMB dialects that communicate over NetBIOS, a transport layer protocol designed to use in Windows operating systems over a network; Port 445: Used by newer versions of SMB (after Windows 2000) on top of a TCP stack, allowing SMB to communicate over the Internet. This also means