How to detect and defend against a TCP port 445 exploit
While ports 137-139 were known technically as "NBT over IP", port 445 is "SMB over IP". (SMB is known as "Samba" and stands for "Server Message Blocks".) Since Windows 2000, SMB runs, by default, with a thin layer, similar to the Session Message packet of NBT's Session Service, on top of TCP, using TCP port 445 rather than TCP port 139—a feature known as "direct host SMB". Windows Server 2003, and older NAS devices use SMB1/CIFS natively. SMB1/CIFS is an extremely chatty protocol, in that it Hi All. I have an oddity here, we had a virus infection of some servers at our DR site, a very persistent one! It kept returning. The oddity is that it added some rules to the Windows Firewall, along with disabling the AV, it added a TCP allow ALL, then added Deny TCP 139 and Deny TCP 445 - anybody got any ideas why it would do that? Apr 11, 2019 · Ports 135, 139, 445 Running a port probe at GRC Shields up always indicates my ports are in stealth mode as I run Samba v 2.0 on my computers (2 Windows 10, 1 Oct 29, 2012 · Port 445 (SMB) is one of the most commonly and easily susceptible ports for attacks. Port 445 is a TCP port for Microsoft-DS SMB file sharing. Many (to most) Windows systems, as well as Linux, have this port open by default, with unsecured shares and un-patched systems unknowingly exposed to everyone [that wants to know]. Along with ports 135, 137 and 139, port 445 is a traditional Microsoft networking port with tie-ins to the original NetBIOS service found in earlier versions of Windows OSes.
Apr 11, 2019 · Ports 135, 139, 445 Running a port probe at GRC Shields up always indicates my ports are in stealth mode as I run Samba v 2.0 on my computers (2 Windows 10, 1
Isolate UDP ports 137 / 138 and TCP ports 139 / 445
Nov 10, 2019
Opening port 445 in win10 - how to ? - Microsoft Community Nov 30, 2018 Do I really need to block TCP ports 445, 135, 137-139