--- title: Data Classification for SMB file shares description: Automate data classification by integrating MineOS with your SMB file server --- [Skip to content](https://docs.mineos.ai/knowledge/smb-integration#main-content) [![Mine](https://docs.mineos.ai/hs-fs/hubfs/Frame%201948756858.png?width=62&height=40&name=Frame%201948756858.png)](https://docs.mineos.ai/knowledge) Open main navigation Close main navigation Hello! How can we help you? - There are no suggestions because the search field is empty. 1. [Help center](https://docs.mineos.ai/knowledge) 2. [Integrations](https://docs.mineos.ai/knowledge/integrations) # Data Classification for SMB file shares ## Automate data classification by integrating MineOS with your SMB file server ### How It Works MineOS connects to your Windows SMB file server over your existing network and performs a statistically representative smart sample scan across your shared drives. Rather than scanning every file, MineOS: - **Classifies PII, PHI, PCI, and other sensitive data** found inside supported file types, producing a report of data types discovered and the folders where they reside. - **Samples proportionally** — to ensure results reflect the true on-disk composition as much as possible, the scanned sample is proportional to the on-disk file-type mix, within the constraints detailed below. **Note**: This integration performs data classification only — it does not fulfill DSR deletion or copy requests on SMB file shares. ### Before You Start - Your SMB environment must use **Active Directory/WORKGROUP with NTLM authentication** - You will need to create a **dedicated read-only user** on your file server for MineOS before setup (see step 4 below). Reusing personal credentials is not recommended. You will need the server hostname, Active Directory domain, username, and password for setting up the integration in Mine. - MineOS must be able to reach your file server over the network. If your server is on a private or on-premise network, a **VPN tunnel** must be configured first. If it is publicly accessible, MineOS IPs must be whitelisted in your firewall. See the [VPN Tunneling guide](https://docs.mineos.ai/knowledge/vpn-tunneling) and [IP Whitelisting guide](https://docs.mineos.ai/knowledge/ip-whitelisting). - SMB port **TCP 445** (DirectTCPTransport) must be open between MineOS and your file server. - \[Optional\] **Enable Preview mode** to view sample PII values alongside classification results. The sample values are stored encrypted and automatically deleted after 7 days. You must enable Preview mode before running the scan to see sample values. For more information about how to set up Preview mode go [here](https://docs.mineos.ai/knowledge/data-classification-preview-mode). ### Setting Up 1. Log in to your MineOS account. On the left sidebar, click **Inventory** → **Data Sources**. Click **Add Data Source** and search for **SMB**. Click **Add.** **![Image 08-06-2026 at 18.25](https://docs.mineos.ai/hs-fs/hubfs/Image%2008-06-2026%20at%2018.25.jpeg?width=670&height=350&name=Image%2008-06-2026%20at%2018.25.jpeg)** 2. Open the newly added **SMB** data source from the Inventory list → navigate to the Integrations tab → **Request Handling** section -\> Select **Integration**. ![Image 08-06-2026 at 18.27](https://docs.mineos.ai/hs-fs/hubfs/Image%2008-06-2026%20at%2018.27.jpeg?width=670&height=285&name=Image%2008-06-2026%20at%2018.27.jpeg) 3. In MineOS, fill in the connection fields: - **Password** — the account password - **Server** — server hostname or IP (e.g., `fileserver01.corp.example.com`) - **Domain** — your Active Directory domain or WORKGROUP (e.g., `corp.example.com`) - **Username** — the dedicated service account username - \[Optional\] **Share name filter** — optional regex, only matching share names are scanned. Leave this blank to scan all eligible shares the service account can access ![Image 08-06-2026 at 18.29-2](https://docs.mineos.ai/hs-fs/hubfs/Image%2008-06-2026%20at%2018.29-2.jpeg?width=644&height=430&name=Image%2008-06-2026%20at%2018.29-2.jpeg) 4. Mark the **Scan this source using Data Classifier** checkbox 5. Click **Test your integration** to verify MineOS can connect to the file server 6. Click **Test & Save** You're done! MineOS has been connected to your SMB file server and will begin the data classification scan. ### Which Shares Are Scanned The SMB integration scans only regular, accessible shares — administrative shares (e.g., C$, ADMIN$, IPC$, PRINT$) and any share whose name ends in `$` are skipped automatically. This means legitimately hidden data folders named with a trailing `$` (e.g., `Finance$`, `HR$`) will also not be scanned. Only standard visible shares are included. | Share example | What it is | Scanned? | | --- | --- | --- | | C$, D$, E$ | Whole disk drive — Windows auto-shares one per drive for remote admin | ✗ Blocked (server admin) | | ADMIN$ | The Windows system folder (C:\\Windows), for remote management | ✗ Blocked (server admin) | | IPC$ | Not a folder — a channel for programs to talk (named pipes / RPC) | ✗ Blocked (not a file share) | | print$ | Shared printer driver files that client PCs download | ✗ Blocked (printer queue/$) | | FAX$ | Working files for the Windows fax service | ✗ Blocked (name ends in $) | | Finance$, HR$ | A normal data folder an admin hid with "$" — holds real files | ✗ Blocked (name ends in $) | | Finance, HR, Documents | Ordinary visible folders where people keep work documents | ✓ Scanned, unless regex set in portal would exclude it | | Users, home dirs | A person's private home / Documents folder | ✓ Scanned, unless regex set in portal would exclude it | | smbuser (Samba phantom) | Listed as a share but won't open when connected to | Skipped gracefully | **Important:** The trailing `$` rule is a fallback for Samba servers that don't set the admin flag — so the scanner skips every `$` share. This means legitimately hidden data folders (like `Finance$` or `HR$`) are also skipped. If you need these folders scanned, rename the share to remove the trailing `$` and ensure the service account has Read access to it.   **Note:** Inaccessible "phantom" shares that appear in the share list but cannot be opened are skipped gracefully — the rest of the scan continues unaffected. ### What MineOS Scans MineOS scans files whose extension belongs to one of the following supported categories. All other file types are silently skipped. | Category | Supported formats | | --- | --- | | Documents | .pdf, .asc, .brf, .c, .cc, .cpp, .cxx, .c++, .dart, .eml, .go, .h, .hh, .hpp, .hxx, .h++, .hs, .html, .htm, .shtml, .shtm, .xhtml, .lhs, .ini, .java, .js, .ocaml, .md, .mkd, .markdown, .m, .ml, .mli, .pl, .pm, .php, .phtml, .pht, .py, .pyw, .rb, .rbw, .rs, .rc, .scala, .sh, .sql, .tex, .txt, .text, .vcard, .vcs, .wml, .xsl, .xsd, .docx, .dotx, .docm, .dotm | | Structured data | .avro, .csv, .tsv, .json, .xml, .yml, .yaml | | Images (via OCR) | .bmp, .gif, .jpg, .jpeg, .jpe, .png | | Spreadsheets | .xlsx, .xlsm, .xltx, .xltm | | Slideshows | .pptx, .pptm, .potx, .potm | | Parquet | .parquet | **Note:** Legacy Office formats (`.doc`, `.xls`, `.ppt`), archives (`.zip`), media files (`.mp4`, `.mp3`), `.odt`, `.rtf`, and other binary formats are not supported and will be silently skipped. Only modern Office Open XML formats are scanned. ### Need Help? If you need any help with this integration, please contact your Customer Success Manager. 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