Is SMB port 445 secure?
blocking all versions of SMB at the network boundary by blocking TCP port 445 with related protocols on UDP ports 137-138 and TCP port 139, for all boundary devices.
How do I block a port?
Blocking ports using Windows FirewallTap on the Windows-key, type Windows Firewall, and select Windows Firewall with Advanced Security from the results.Click on Inbound Rules when the firewall window opens.Select New Rule from the Actions pane.Select Port from the Rule Type listing.More items…•
What is the use of port 445?
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 close port 445 on Windows 10?
Step 1: Open the Control Panel Step 2: Click on Windows Firewall/ Windows Defender firewall Step 3: Navigate to advanced settings. Step 4:Right click on inbound rules and click on new rule. Step 6:Select port and press next Step 7:Specify the port 445 under specific local ports, select TCP and press next.
Should I disable port 445?
We also recommend blocking port 445 on internal firewalls to segment your network – this will prevent internal spreading of the ransomware. Note that blocking TCP 445 will prevent file and printer sharing – if this is required for business, you may need to leave the port open on some internal firewalls.
Is SMB secure?
An information worker’s sensitive data is moved by using the SMB protocol. SMB Encryption offers an end-to-end privacy and integrity assurance between the file server and the client, regardless of the networks traversed, such as wide area network (WAN) connections that are maintained by non-Microsoft providers.