Changing connection from SMB to AFP, reconnected share, no impact; The final change, disabling Delayed TCP ack, fixed it. One other possible culprit of slow performing SMB file shares may be SMB packet signing to be enabled on your Mac. All SMB 3 sessions must be signed unless you connect as a guest or anonymously. macOS has built-in support for SMB 1 / CIFS, SMB 2, as well as SMB 3. If I recall correctly, you're going to need to disable digital signing on the server and allow passwords to be transmitted in clear text. Tiger specifically has serious issues with SMB. It requires the connection to perform a validate negotiate request after it authenticates. Server Message Block (SMB) 3 is the default way to connect to a server in macOS. In short, think of the three as Apple, Unix and Windows protocols. My questions: 1) Is it worth it to enable SMB signing and reduce the performance or not? Using Terminal, Create /etc/nsmb.conf. In macOS High Sierra 10.13 and later, the default settings for browsing network folders such as Server Message Block (SMB) shares are ideal for most organizations and users. To disable this, you’ll need to edit (or create the file if it’s not there), as described by this Apple article: This article describes Server Message Block (SMB) signing. SMB signing was first available in Microsoft Windows NT 4.0 Service Pack 3 (SP3) and Microsoft Windows 98. Permalink. Packet signing for SMB 2 or SMB 3 connections turns on … Disabling SMB Signing (smb_signing) and it did show it as disabled in the terminal but had no impact for me. Für FileServer Zugriffe wird … Hallo NG, soweit ich informiert bin, wird SMB signing verwendet, um -man in the middle attacken- während des Logon Prozesses zu verhindern. By default SMB signing is disabled (except domain controllers), enabling it will come with performance payback (around 15% performance decrease). SMB signing deaktivieren (zu alt für eine Antwort) Valentin 2006-10-11 13:13:15 UTC. SMB signing is a security mechanism in the SMB protocol and is also known as security signatures. This feature was introduced in Windows 2000 and since then, it’s being supported by all versions of Windows operating systems. The underlying problem is that Apple had it's own version of SMB … If you access SMB shares, this may affect you. I disabled on both server and client and reconnected the share and restarted all services. But you can make adjustments to optimize SMB browsing in enterprise environments. Each has its list of pros and cons, but for Mac users, AFP is typically the route to take. In macOS 10.13.4 and later, packet signing is off by default. If you set the -identity-preserve option to true (ID-preserve), the SMB signing security setting is replicated to the destination. When you set up a storage virtual machine (SVM) disaster recovery relationship, the value that you select for the -identity-preserve option of the snapmirror create command determines the configuration details that are replicated in the destination SVM.. SMB also provides some specific features, such as network printing, shared folder authentication, file locking, etc. Turn off packet signing for SMB 2 and SMB 3 connections. sudo vi /etc/nsmb.conf Force SMB2 and disable packet signing [default] signing_required=no protocol_vers_map=2 Using Terminal, Skip Reading .DS_Store Files from SMB (from Apple Support) We also recommend you to disable SMB signing on clients that access a Vess R2600 to gain better performance on your macOS 10.11.5 - 10.13.3 clients. First, and both crudest and simplest, is to force your Mavericks Mac to use SMB instead of SMB2. SMB signing is designed to help improve the security of the SMB protocol. Here's what I did: Disconnect from all SMB shares before continuing! Leopard was an improvement but not fantastic.