Comments on: What is an SMB Port? What is Port 445 and Port 139 used for? https://www.thewindowsclub.com/smb-port-what-is-port-445-port-139-used-for TheWindowsClub covers authentic Windows 11, Windows 10 tips, tutorials, how-to's, features, freeware. Created by Anand Khanse, MVP. Thu, 25 Dec 2025 15:32:45 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Mike S https://www.thewindowsclub.com/smb-port-what-is-port-445-port-139-used-for#comment-61871 Thu, 21 Dec 2017 00:56:00 +0000 http://www.thewindowsclub.com/?p=127293#comment-61871 Is it unreasonable to want a solution where the firewall blocks port 139 except for authenticated smb traffic, in which case it is temporarily opened only for the amount of time it takes to send the IP traffic, then closed again, kind of like vlan smb?

]]> By: Dale Broadbent https://www.thewindowsclub.com/smb-port-what-is-port-445-port-139-used-for#comment-60935 Sat, 30 Sep 2017 12:47:00 +0000 http://www.thewindowsclub.com/?p=127293#comment-60935 Learned a lot about some very important IT security concepts – thanks!

]]> By: Himalia https://www.thewindowsclub.com/smb-port-what-is-port-445-port-139-used-for#comment-60474 Tue, 15 Aug 2017 09:09:00 +0000 http://www.thewindowsclub.com/?p=127293#comment-60474 In reply to KeepOnLearning.

How ungrateful are you !

]]> By: BCOD Admin https://www.thewindowsclub.com/smb-port-what-is-port-445-port-139-used-for#comment-59932 Sat, 01 Jul 2017 09:37:00 +0000 http://www.thewindowsclub.com/?p=127293#comment-59932 file and print sharing resource (ComputerName) is online but isn’t responding to connection attempts. Detected Detected

The remote computer isn’t responding to connections on port 445, possibly due to firewall or security policy settings, or because it might be temporarily unavailable. Windows couldn’t find any problems with the firewall on your computer.

How to Reslove.. Plz help not able to acce my shared file and folder ?

]]> By: nm https://www.thewindowsclub.com/smb-port-what-is-port-445-port-139-used-for#comment-59706 Mon, 12 Jun 2017 04:31:00 +0000 http://www.thewindowsclub.com/?p=127293#comment-59706 Thank you for this information. Very helpful. How do I block these ports at the router level so that I don’t interfere with dhcp?

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