The Microsoft-DS file-sharing port with number 445 is one of the biggest targets for hackers. This port is type SMB (Server Message Block), meaning it operates as an application-layer network protocol and is mainly used for providing shared access to files, printers, and whatnot.

What is port 445 Microsoft DS used for?

Port 139 is used for Network Basic Input Output System (NetBIOS) name resolution and port 445 is used for Server Message Blocks (SMB). They all serve Windows File and Printer Sharing.

Why port 445 is blocked?

Cause. This issue occurs because the Adylkuzz malware that leverages the same SMBv1 vulnerability as Wannacrypt adds an IPSec policy that’s named NETBC that blocks incoming traffic on the SMB server that’s using TCP port 445.

What port is Microsoft DS?

Microsoft DS is the name given to port 445 which is used by SMB (Server Message Block). SMB is a network protocol used mainly in Windows networks for sharing ressources (e.g. files or printers) over a network. It can also be used to remotely execute commands.

What is Microsoft DS port 445 used for?

Microsoft DS is the name given to port 445 which is used by SMB (Server Message Block). SMB is a network protocol used mainly in Windows networks for sharing ressources (e.g. files or printers) over a network. It can also be used to remotely execute commands.

What port does SMB use in Windows?

In Windows 2K/XP, Microsoft added the possibility to run SMB directly over TCP/IP, without the extra layer of NetBT. For this they use TCP port 445. Port 445 should be blocked at the firewall level.

What port does the IRC worm open?

The worm connects to IRC servers and listens for remote commands on port 8080/tcp. It opens port 69/udp to initiate TFTP transfers. It also opens a backdoor on remote compromised computers on port 8594/tcp.