However, on an older Linux and Unix distro you need to disable it manually to avoid security issues. NOTE: Please note that Samba version 4.11 removes SMB1 protocol version by default. Run the following command on Debian 8.x/Ubuntu 16.04 LTS Linux: Run the following command on CentOS 7/RHEL 7/Fedora Linux:

Hence setting the following gives best option: By default SMB3 selects the SMB3_11 variant. SMB3_11: Windows 10 technical preview SMB3 version (maybe final).SMB3_10: early Windows 10 technical preview SMB3 version.(By default SMB2 selects the SMB2_10 variant.) Used by Windows Vista and later versions of Windows. SMB2: Re-implementation of the SMB protocol.client max protocol – The value of the parameter (a string) is the highest protocol level that will be supported by the client.client min protocol – This setting controls the minimum protocol version that the client will attempt to use.Understanding min and max protocol levels in smb.conf The following seems to work with Windows 10/Linux clients too as noted by many in the comments section below: However, you must disable SMBv1 on Samba server running on Linux or Unix-like system.įig.01: How to force SMB2 protocol in samba on Linux or Unix In short Linux/Unix users are not affected by this attack. You must apply those patches ASAP on Windows operating systems. Microsoft has released software updates for Windows XP and Windows Server 2003. To get back your files, you need to pay ransom payments in the cryptocurrency Bitcoin. If you are using older and unsupported operating systems such as Windows XP and Windows Server 2003, you will get infected. The attack spreads by phishing emails but also uses the EternalBlue exploit and DoublePulsar backdoor developed by the U.S.

Introduction: WannaCrypt/WannaCry targets the Microsoft Windows operating system.

Is it possible to disable SMBv1 on a Linux or UNIX-like operating system? I am a new Linux user and for security reasons and to avoid ransomware, I would like to disable the SMB1 protocol in samba configuration on a CentOS Linux version 7 server.

Smb client for windows 7