What is Port TCP 445 used for?

Port 445 is a traditional Microsoft networking port with tie-ins to the original NetBIOS service found in earlier versions of Windows OSes. Today, port 445 is used by Microsoft Directory Services for Active Directory (AD) and for the Server Message Block (SMB) protocol over TCP/IP.

What Port needs to be open for 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.

Is Port 445 enough?

2 Answers. So port 445 is sufficient if you can work with IP addresses only. At my site, NetBIOS names are always the same as DNS names.

How does SMB file sharing work?

Using the SMB protocol, an application (or the user of an application) can access files or other resources at a remote server. This allows applications to read, create, and update files on the remote server. SMB can also communicate with any server program that is set up to receive an SMB client request.

Does the share allow anonymous access Y N?

To answer this, we need to attempt to login to the share as anonymous. We do this with the command: smbclient //10.10. 109.231/profiles -U anonymous -p 139 And then enter nothing when prompted for a password. Our answer is yes (Y), anonymous is in fact allowed on this share.

What is port 445 used for?

It’s a transport layer protocol designed to use in Windows operating systems over a network. 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. This also means you can use IP addresses in order to use SMB like file sharing. Are Open Ports Dangerous?

What is the difference between ports 139 and 445?

What are ports 139 and 445? SMB is a network file sharing protocol that requires an open port on a computer or server to communicate with other systems. SMB ports are generally port numbers 139 and 445. Port 139 is used by SMB dialects that communicate over NetBIOS.

Why does SMB still use port 445?

By Microsoft Windows 2000, Microsoft had changed SMB to operate over port 445. SMB still uses port 445. This proved to be problematic as CIFS was a notoriously chatty protocol that could ruin network performance due to latency and numerous acknowledgments.

What ports are associated with file sharing and Server Message blocks?

The following ports are associated with file sharing and server message block (SMB) communications: 1 Microsoft file sharing SMB: User Datagram Protocol (UDP) ports from 135 through 139 and Transmission Control Protocol… 2 Direct-hosted SMB traffic without a network basic input/output system (NetBIOS): port 445 (TCP and UPD). More