Does Cifs use port 445?

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.

What is port 445 normally used for?

TCP port 445 is used for direct TCP/IP MS Networking access without the need for a NetBIOS layer. This service is only implemented in the more recent verions Windows starting with Windows 2000 and Windows XP. The SMB (Server Message Block) protocol is used among other things for file sharing in Windows NT/2K/XP.

How do I enable SMB port 445?

Go to Computer Configuration > Policies > Windows Settings > Security Settings > Windows Firewall with Advanced Security > Windows Firewall with Advanced Security – LDAP > Inbound Rules. Right-click and choose New Rule. Choose Port and click Next. Choose TCP and at specific local ports enter 135, 445, then click Next.

How do I check if port 445 is open?

Know if Your Port 445 is Enabled or Not Press Windows + R key combo to start Run box. Input “cmd” to start Command Prompt. Then type: “netstat –na” and press Enter. “netstat –na” command means scan all connected port and showing in numbers.

What happens if I block port 445?

Blocking TCP 445 will prevent file and printer sharing and also other services such as DHCP (dynamic host configuration protocol) which is frequently used for automatically obtaining an IP address from the DHCP servers used by many corporations and ISPs(Internet Service Providers) will stop functioning.

Is port 445 unsecure?

Like Windows port 135 (which is a whole different problem) port 445 is deeply embedded in Windows and can be difficult or impossible to safely close.

Is SMB port 445 secure?

‍Ports 135-139 and 445 are not safe to publicly expose and have not been for a decade.

Is port 445 insecure?

Malicious hackers admit, that Port 445 is vulnerable and has many insecurities. One chilling example of Port 445 misuse is the relatively silent appearance of NetBIOS worms.

Is port 445 open by default?

If the server has NBT enabled, it listens on UDP ports 137 and 138, and TCP ports 139 and 445. All four ports are open as default in all versions of Windows, including Windows 10 and Windows Server 2019.