Does SMB use TCP or UDP?

SMB relies on the TCP and IP protocols for transport. This combination potentially allows file sharing over complex, interconnected networks, including the public Internet. The SMB server component uses TCP port 445.

Is SMB port TCP or UDP?

The SMB port number is TCP 445.

Does SMB require UDP?

Summary. Windows supports file and printer-sharing traffic by using the SMB protocol directly hosted on TCP. SMB 1.0 and older CIFS traffic supported the NetBIOS over TCP (NBT) protocol supported the UDP transport, but starting in Windows Vista and Windows Server 2008 with SMB 2.0. 2, requires TCP/IP over port 445.

What protocol does SMB use?

Now, SMB runs directly over TCP/IP and uses port 445. Today, communications with devices that do not support SMB directly over TCP/IP require the use of NetBIOS over a transport protocol such as TCP/IP. Microsoft Windows operating systems (OSes) since Windows 95 have included client and server SMB protocol support.

Which TCP port does SMB use?

SMB ports are generally port numbers 139 and 445. Port 139 is used by SMB dialects that communicate over NetBIOS. It operates as an application layer network protocol for device communication in Windows operating systems over a network.

What is an SMB Port? What is Port 445 and Port 139 used for?

Is port 445 a TCP?

Other ports

SMB is available directly over TCP (port 445) and over NetBIOS over TCP/IP (port 139).

What UDP ports does SMB use?

SMB uses either IP port 139 or 445.

Does SMB use TLS?

With Windows 11 and Windows Server 2022 Datacenter: Azure Edition, you can use SMB over QUIC to connect to file servers in Azure. This uses UDP port 443 by default and provides a TLS 1.3-encrypted security tunnel like a VPN for the SMB traffic. For more information, see SMB over QUIC.

Does SMB use NetBIOS or DNS?

The default is NetBIOS. Many SMB clients have configuration options to enable NetBIOS over TCP/IP, SMB directly over TCP/IP, or both. The server responds on the enabled ports; the client software can choose to attempt one protocol prior to the other or both in parallel.

How does SMB communicate?

Like any network file sharing protocol, SMB block needs network ports to communicate with other systems. Originally, it used port 139 that allowed computers to communicate on the same network. But since Windows 2000, SMB uses port 445 and the TCP network protocol to “talk” to other computers over the internet.

Is port 445 a UDP?

Side note: UDP port 445 uses the Datagram Protocol, a communications protocol for the Internet network layer, transport layer, and session layer. This protocol when used over PORT 445 makes possible the transmission of a datagram message from one computer to an application running in another computer.

Is port 139 TCP or UDP?

Inbound connection in port 139 (TCP) is not blocked in Windows firewall. Port 139 is utilized by NetBIOS Session service. Enabling NetBIOS services provide access to shared resources like files and printers not only to your network computers but also to anyone across the internet.

Does LDAP use TCP or UDP?

LDAP is an application layer protocol that uses port 389 via TCP or user datagram protocol (UDP). LDAP queries can be transmitted in cleartext and, depending upon configuration, can allow for some or all data to be queried anonymously.

What is port 445 TCP UDP?

TCP port 445 is used for direct TCP/IP MS Networking access without the need for a NetBIOS layer.

What is the difference between SMB and SMB2?

SMB2 a.k.a. SMBv2 or SMB 2.0 was released by Microsoft in 2006 with Windows Vista. This Microsoft SMB2 protocol implementation improved performance and security when compared to SMB1. For example, SMB2 increased packet sizes to 32-bit — and even 128-bit for file handles — a significant improvement over SMB1's 16-bits.

Is NetBIOS TCP or UDP?

NetBIOS provides three distinct services: Name service for name registration and resolution (ports: 137/udp and 137/tcp) Datagram distribution service for connectionless communication (port: 138/udp) Session service for connection-oriented communication (port: 139/tcp)

Does NetBIOS use TCP or UDP?

NetBIOS over TCP/IP (NBT)

The protocols in the NetBIOS over TCP/IP suite implements the NetBIOS services atop TCP and UDP, which is described in RFC 1001 and RFC 1002.

What TCP port does SMB2 use?

SMB2 runs on top of TCP ports 139 and 445 which are the same ports used by the older SMB protocol. TCP: SMB2 uses TCP as its transport protocol. The well known TCP port for SMB2 is 445.

Is SMB based on TCP?

Features. Server Message Block (SMB) enables file sharing, printer sharing, network browsing, and inter-process communication (through named pipes) over a computer network. SMB serves as the basis for Microsoft's Distributed File System implementation. SMB relies on the TCP and IP protocols for transport.

Is SMB 3.0 encrypted?

SMB 3.0 and 3.02 use a more recent encryption algorithm for signing: Advanced Encryption Standard (AES)-cipher-based message authentication code (CMAC).

Is SMB 2.0 encrypted?

The system doesn't encrypt the data that goes to other shares on the same server. Encryption requires that you enable SMB signing. New Signing Algorithm - SMB3 uses the AES-CMAC algorithm instead of the HMAC-SHA256 algorithm used by SMB2 and enables signing by default.

Is SNMP port 162 TCP or UDP?

SNMP Port Numbers

SNMP generally uses User Datagram Protocol (UDP) port numbers 161 and 162. An SNMP port is an SNMP communication endpoint—a logical construct that identifies SNMP data transfers. SNMP message transfers happen via UDP.

Is SMB faster than FTP?

FTP is extremely fast and efficient compared to SMB when transferring large files. It can be difficult when it comes to small files, but overall, the speed of the FTP file transferring protocol is better. The use of short messages in SMB makes it sensible to network latency, which can decrease the speed.

Is SMB and Samba the same?

The name Samba comes from SMB (Server Message Block), the name of the proprietary protocol used by the Microsoft Windows network file system.

Is port 444 a TCP or UDP?

It is a fairly simple protocol that may run over TCP port 444 and sends out a page using only a handful of well-documented commands.