General Internet File Sharing

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The Server Message Block (SMB) Protocol is a network file sharing protocol, and as implemented in Microsoft Windows is known as Microsoft SMB Protocol. The set of message packets that defines a particular version of the protocol is called a dialect. The Common Internet File System (CIFS) Protocol is a dialect of SMB. Both SMB and CIFS are also available on VMS, several versions of Unix, and other operating systems.

Server Message Block (SMB) enables file sharing, printer sharing, network browsing, and inter-process communication (through named pipes) over a computer network. SMB serves as the basis for Microsoft's Distributed File System implementation.

SMB relies on the TCP and IP protocols for transport. This combination potentially allows file sharing over complex, interconnected networks, including the public Internet. The SMB server component uses TCP port 445. SMB originally operated on NetBIOS over IEEE 802.2 - NetBIOS Frames or NBF - and over IPX/SPX, and later on NetBIOS over TCP/IP (NetBT), but Microsoft has since deprecated these protocols. On NetBT, the server component uses three TCP or UDP ports: 137 (NETBIOS Name Service), 138 (NETBIOS Datagram Service), and 139 (NETBIOS Session Service).

The Samba project provides file sharing and print services for computers on a network. It uses the Server Message Block and Common Internet File System (SMB/CIFS) protocol, so the services created by running Samba are available to Linux, macOS, and Windows clients. It's an essential service to run in organizations that support multiple operating systems, and it's even useful on homogenous networks.

Setting up file sharing with Samba is easy and provides flexible cross-platform collaboration. Additional configuration options are available when using workgroups and domains or when Samba is the Active Directory domain controller. It's built into all major operating systems, has rich terminal and GUI tools, and is quick to configure. Help your users break through silos and share data with Samba.

CIFS (Common Internet File System) is a Windows file sharing protocol that is based on the client-server programming model. In other words, a client application will use CIFS to make requests to a server, which then returns a response.

CIFS stands for Common Internet File System, a protocol used for file sharing across multiple platforms. This protocol is used on Windows operating systems to give access to clients for file sharing and printing services. By providing file access, clients can open, read, and edit the documents, which will be automatically saved on local computers.

A client/user can open, read, modify and close multiple files on a target server. The server is tasked with file sharing, meaning multiple clients can open and read the same file simultaneously and on different devices.

Although cloud file sharing and access services seem to be taking over, traditional protocols like CIFS still have their space. Support for direct connections over TCP port 445 was one of the biggest selling points for the CIFS. Even though Microsoft is now focusing on progressing SMB, CIFS cannot be forgotten as it is one of the SMB dialects.

Since most contemporary data storage systems employ the more reliable Server Message Block (SMB) 2.0 and 3.0 file-sharing protocols, which were significant enhancements to CIFS, CIFS is now regarded as being outdated.

The current generation SMB protocol, which is used for file sharing on Windows computers, was inspired by the CIFS protocol. For gaining access to files and folders on Windows networks, SMB is frequently utilized.

As an administrator, you can control if users can share Google Drive files and folders with people outside your organization who have Google Accounts. These sharing settings apply to items from Google Docs, Sheets, Slides, My Maps, folders, and anything else stored in Drive.

We're excited to announce the general availability of larger, more powerful standard file shares for Azure Files. Azure Files is a secure, fully managed public cloud file storage with full range of data redundancy options and hybrid capabilities using Azure File Sync.

With the release of large file shares, a single standard file share in a general purpose account can now support up to 100 TiB capacity, 10K IOPS, and 300 MiB/s throughput. All premium file shares in Azure FileStorage accounts currently support large file shares by default. If your workload is latency sensitive and requires a higher level of performance, you should consider Azure Files premium tier. Visit Azure Files scale limits documentation to get more details.

Create a new general purpose storage account in one of the supported regions on a supported redundancy option. While creating storage account, go to Advanced tab and enable Large file shares feature. See detailed steps on how to enable large file shares support on a new storage account. All new shares created under this new account will, by default, have 100 TiB capacity with increased scale.

On an existing general purpose storage account that resides on one of the supported regions, go to Configuration, enable Large file shares feature, and hit Save. You can now update quota for existing shares under this upgraded account to more than 5 TiB. All new shares created under this upgraded account will, by default, have 100 TiB capacity with increased scale.

We are taught early in our lives that sharing is good. Network File System (NFS) was built on the principle of sharing. NFS is an Internet Standard, client/server protocol developed in 1984 by Sun Microsystems to support shared, originally stateless, (file) data access to LAN-attached network storage. As such, NFS enables a client to view, store, and update files on a remote computer as if they were locally stored. On the back end, NFS client software translates POSIX file access commands issued by applications into NFS server requests that respond with metadata, data, and status. The main versions in deployment these days (client and server) are NFSv3, NFSv4, and NFSv4.1.

There are other problems with NFS, but these are our top five. Yes, block size restrictions could easily be made larger, but then the timeouts would need to be adjusted and perhaps rethought. And yes, parallel file access is coming, but protocol chattiness and file sharing (locking-caching) problems listed above are much more difficult to solve.

CIFS/SMB was originally introduced by IBM in the 1980s and popularized by Microsoft as the core file sharing mechanism for the Windows operating system. Today, the protocol can also be found in numerous environments. CIFS/SMB has been through several releases with the most current version, SMB 3.0, available in Windows 8 and Windows Server 2012.

Collaborate using these services to ensure secure connections and improve your daily business interactions with patients, partners and colleagues. Tools like Send Secure Encrypted Email, Web Conferencing, Dropbox Business and Syncplicity are offered and supported by Mass General Brigham IS. ERIS supports additional services such as file sharing, email lists, team collaboration and project management tools.

Common Internet File System was introduced as a specific or advanced version of Server Message Block (SMB), which was created by Microsoft in the year of 1996. It is basically used for sharing the files remotely via Internet Protocol (IP).

This protocol enables the client to manipulate the files as same as if they were manipulating on the local computers. It also allows a group of users for sharing the document within corporate intranets. It provides various features which are not supported by NFS. This protocol is also supported by other OS such as Unix.

SMB is normally run on top of NetBT. Newer implementations alsosupport SMB over TCP/IP directly; in this configuration, it is almostalways called CIFS. Note that whatever this protocol is called, it isthe exact same protocol whether it is run over NetBT or over TCP/IPdirectly, and that it was called CIFS even when it did not run overTCP/IP directly. We refer to it as "SMB" here mostlybecause it is used for a variety of things in addition to filesharing, and we find it misleading to refer to it as a filesystem inthis context.

The SMB protocol provides a variety of different operations. Many ofthese are standard operations for manipulating files (open, read,write, delete, and set attributes, for instance), but there are alsospecific operations for other purposes (messaging and printing, forinstance) and several general-purpose mechanisms for doinginterprocess communication using SMB. SMB allows sharing not only ofstandard files, but also of other things, including devices, namedpipes, and mailslots. (Named pipes and mailslots are mechanisms forinterprocess communication; named pipes provide a data stream, whilemailslots are message-oriented.) It therefore provides suitable callsfor manipulating these other objects, including support for devicecontrols (I/O controls, or ioctls) and severalgeneral-purpose transaction calls for communication betweenprocesses. It is also sometimes possible to use the same filemanipulation calls that are used on normal files to manipulatespecial files.

In practice, there are two major uses for SMB; file sharing andgeneral-purpose remote transactions. General-purpose remotetransactions are implemented by running DCE RPC over SMB, through thesharing of named pipes. In general, any application is using DCE RPCover SMB if it says it uses named pipes; if it relies on\PIPE\something_or_other,\Named Pipe\something_or_other, orIPC$; if it requires port 138, 139, or 445; or if it mentions SMB orCIFS transactions. Applications that normally use this include NTLMauthentication, the Server Manager, the Registry Editor, the EventViewer, and print spooling.

14.4.3. Proxying Characteristics of SMBSMB is not particularly difficult to proxy, but it is difficult toimprove its security with a proxy. Because many things areimplemented as general-purpose transactions, it's hard for aproxy to know exactly what effect an operation will have on the endmachine. The proxy can't just track requests but also needs totrack the filenames those requests refer to. In addition, theprotocol allows for some operations to be chained together, so that asingle transaction may include a tree connect, an open, and a read(for instance). This means that a proxy that is trying to controlwhat files are opened has to do extensive parsing on transactions tomake certain that no inappropriate opens are late in the chain. It isnot sufficient to simply check the transaction type. 781b155fdc