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May 18, 2023 · This article describes how to enable and disable Server Message Block (SMB) version 1 (SMBv1), SMB version 2 (SMBv2), and SMB version 3 (SMBv3) on the SMB client and server components.
Jun 8, 2020 · For SMBv1, use the filter smb, for SMBv2, use smb2, and for SMBv3, use smb2 && smb2.cmd == 0x11. Understanding the differences between SMB versions is crucial for securing your network. To mitigate the risks associated with SMBv1, consider disabling it on all devices, as Microsoft recommends.
Oct 26, 2018 · The problem with SMBv1 is SMB Relay Attacks and ultimately the attacker harvesting credentials using it. Windows provides a way to require digital signing of network communications, specifically related to SMB communications.
Feb 5, 2021 · SMBv1 vulnerability is dangerous for larger networks. A modest home LAN should avoid SMBv1, but an old device disconnected from the internet cannot be used as an entry-point by an attacker. For more information, see : Microsoft's advisory Stop using SMB1.
May 18, 2023 · By default, AES-128-GCM is negotiated with SMB 3.1.1, bringing the best balance of security and performance. Windows Server 2022 and Windows 11 SMB Direct now support encryption. Previously, enabling SMB encryption disabled direct data placement, making RDMA performance as slow as TCP.
Mar 6, 2024 · As a defense in depth measure, you can use segmentation and isolation techniques to secure SMB traffic and reduce threats between devices on your network. SMB is used for file sharing, printing, and inter-process communication such as named pipes and RPC.
Apr 19, 2022 · The SMB protocol is a client–server communication protocol that has been used by Windows since the beginning for sharing files, printers, named pipes, and other network resources. SMB stands for "server message block." Apart from regular resource sharing, SMB is also useful for inter-process communication (IPC), such as in mailslots. Author.
