It's important to note that disabling NetBIOS over TCP/IP will also disable NetBIOS name service for that adapter (a.k.a. Uncheck 'File and Printer Sharing for Microsoft Networks' to ensure Windows will not answer to SMB traffic on port 445 for this adapter. To free port 139 for a given adapter, go to 'Internet Protocol (TCP/IP) Properties' > Advanced > WINS, and select 'Disable NetBIOS over TCP/IP'. This means that if you'll disable port 445 (or block it using a firewall), you'll be able to use a different service on port 139 for every IP address. Windows bind port 139 to the first IP addres of every adapter, while port 445 is bound globally. Method 2: Use Windows File Sharing AND SMBLibrary: "TCP\IP NETBIOS Helper" should be enabled). Navigate to 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBT\Parameters' and set 'SMBDeviceEnabled' to '0' (this will free port 445).ĭisable the "Server" service (p.s.For every network adapter: Uncheck 'File and Printer Sharing for Microsoft Networks".there are several techniques to free / utilize those ports: Method 1: Disable Windows File and Printer Sharing server completely: Windows XP/2003: SMB2: Direct TCP hosting supports large MTUs.īy default, Windows already use ports 139 and 445.A 'keep alive' packet is sent from time to time over NBT connections.A 'session request' packet is initiating the NBT connection.Direct TCP hosting (port 445) 'NetBIOS over TCP' and 'Direct TCP hosting' are almost identical, the only differences:.Windows specific implementations can be found in SMBLibrary.Win32.
SMBLibrary shares can be accessed from any Windows version since Windows NT 4.0. SMBLibrary is modular, you can take advantage of Integrated Windows Authentication and the Windows storage subsystem on a Windows host or use independent implementations that allow for cross-platform compatibility. NET developers an easy way to share a directory / file system / virtual file system, with any operating system that supports the SMB protocol. SMBLibrary is an open-source C# SMB 1.0/CIFS, SMB 2.0, SMB 2.1 and SMB 3.0 server and client implementation.
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