What ports do SMB and CIFS use?
What ports do SMB and CIFS use?
Common Internet File Service (CIFS) is the successor to the server message block (SMB) protocol. CIFS is the primary protocol used by Windows systems for file sharing. CIFS uses UDP ports 137 and 138, and TCP ports 139 and 445.
Which TCP port does SMB use?
Port 445 is used by newer versions of SMB (after Windows 2000) on top of a TCP stack, allowing SMB to communicate over the Internet.
Is SMB port 445 TCP or UDP?
TCP
SMB is available directly over TCP (port 445) and over NetBIOS over TCP/IP (port 139). Other ports you may see connected with NetBIOS communications are port 137 (nbname) and port 138 (nbdatagram) over User Datagram Protocol.
Does SMB need port 139?
As such, SMB requires network ports on a computer or server to enable communication to other systems. SMB uses either IP port 139 or 445.
Is port 445 enough for SMB?
Yes, modern SMB (especially v2/v3) runs only on TCP port 445.
What uses TCP port 445?
Port 445 is associated with SMB (Service Message Block), an application layer network protocol that is mostly used for file sharing, printer sharing, and serial port sharing.
Is port 139 still needed for SMB?
What is TCP 139 used for?
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.
What is TCP 22 used for?
Well-known ports
| Port | TCP | Description |
|---|---|---|
| 21 | Yes | File Transfer Protocol (FTP) control (command) |
| 22 | Yes | Secure Shell (SSH), secure logins, file transfers (scp, sftp) and port forwarding |
| 23 | Yes | Telnet protocol—unencrypted text communications |
| 25 | Yes | Simple Mail Transfer Protocol (SMTP), used for email routing between mail servers |
Is 8443 UDP or TCP?
Port 8443 Details
| Port(s) | Protocol | Service |
|---|---|---|
| 8443 | tcp | |
| 8443 | tcp | pcsync-ssl |
| 8443 | tcp | https-alt |
| 8443 | tcp,udp | pcsync-https |
Why is port 8443 used?
Port 8443 in Apache Tomcat is used for running your service at HTTPS, it requires parameters to be specified as mentioned below. The above code enables SSL on port 8443, the default port for HTTPS is 443, so to avoid conflicts it uses 8443 instead of 443 just like 8080 for HTTP instead of 80.
What ports are used for SMB file sharing?
SMB has always been a network file sharing protocol. As such, SMB requires network ports on a computer or server to enable communication to other systems. SMB uses either IP port 139 or 445.
How to keep your SMB port secure?
Keeping your SMB port secure requires you to take the following steps: Never expose SMB ports on the internet. Firewall protection and endpoint protection can help to protect your network from attacks and hackers. Make sure all inbound and outbound SMB traffic is restricted.
What is the difference between CIFS and samba?
CIFS: CIFS is a common file sharing protocol used by Windows servers and compatible NAS devices. Samba: Samba is an open-source implementation of Microsoft Active Directory that allows non-Windows machines to communicate with a Windows network.
What are the additional Microsoft SMB protocol functionality?
Although its main purpose is file sharing, additional Microsoft SMB Protocol functionality includes the following: Determining other Microsoft SMB Protocol servers on the network, or network browsing
