- Timestamp:
- Oct 30, 2009, 9:39:05 AM (16 years ago)
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
branches/samba-3.3.x/docs/htmldocs/Samba3-HOWTO/AccessControls.html
r274 r342 1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 16. File, Directory, and Share Access Controls</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.74.0"><link rel="home" href="index.html" title="The Official Samba 3.3.x HOWTO and Reference Guide"><link rel="up" href="optional.html" title="Part III. Advanced Configuration"><link rel="prev" href="rights.html" title="Chapter 15. User Rights and Privileges"><link rel="next" href="locking.html" title="Chapter 17. File and Record Locking"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 16. File, Directory, and Share Access Controls</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="rights.html">Prev</a> </td><th width="60%" align="center">Part III. Advanced Configuration</th><td width="20%" align="right"> <a accesskey="n" href="locking.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="AccessControls"></a>Chapter 16. File, Directory, and Share Access Controls</h2></div><div><div class="author"><h3 class="author"><span class="firstname">John</span> <span class="othername">H.</span> <span class="orgname">Samba Team</span> <span class="surname">Terpstra</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jht@samba.org">jht@samba.org</a>></code></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">Jeremy</span> <span class="orgname">Samba Team</span> <span class="surname">Allison</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jra@samba.org">jra@samba.org</a>></code></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">Jelmer</span> <span class="othername">R.</span> <span class="orgname">The Samba Team</span> <span class="surname">Vernooij</span></h3><span class="contrib">drawing</span> <div class="affiliation"><span class="orgname">The Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jelmer@samba.org">jelmer@samba.org</a>></code></p></div></div></div></div><div><p class="pubdate">May 10, 2003</p></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="AccessControls.html#id2610573">Features and Benefits</a></span></dt><dt><span class="sect1"><a href="AccessControls.html#id26107 59">File System Access Controls</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2610774">MS Windows NTFS Comparison with UNIX File Systems</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2611116">Managing Directories</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2611240">File and Directory Access Control</a></span></dt></dl></dd><dt><span class="sect1"><a href="AccessControls.html#id2611906">Share Definition Access Controls</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2611939">User- and Group-Based Controls</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2612307">File and Directory Permissions-Based Controls</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2612644">Miscellaneous Controls</a></span></dt></dl></dd><dt><span class="sect1"><a href="AccessControls.html#id2612982">Access Controls on Shares</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2613130">Share Permissions Management</a></span></dt></dl></dd><dt><span class="sect1"><a href="AccessControls.html#id2613477">MS Windows Access Control Lists and UNIX Interoperability</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2613483">Managing UNIX Permissions Using NT Security Dialogs</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2613530">Viewing File Security on a Samba Share</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2613601">Viewing File Ownership</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2613744">Viewing File or Directory Permissions</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2613960">Modifying File or Directory Permissions</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2614117">Interaction with the Standard Samba create mask Parameters</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2614486">Interaction with the Standard Samba File Attribute Mapping</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2614559">Windows NT/200X ACLs and POSIX ACLs Limitations</a></span></dt></dl></dd><dt><span class="sect1"><a href="AccessControls.html#id2614978">Common Errors</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2614989">Users Cannot Write to a Public Share</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2615312">File Operations Done as root with force user Set</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2615358">MS Word with Samba Changes Owner of File</a></span></dt></dl></dd></dl></div><p>2 <a class="indexterm" name="id261040 3"></a>1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 16. File, Directory, and Share Access Controls</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.74.0"><link rel="home" href="index.html" title="The Official Samba 3.3.x HOWTO and Reference Guide"><link rel="up" href="optional.html" title="Part III. Advanced Configuration"><link rel="prev" href="rights.html" title="Chapter 15. User Rights and Privileges"><link rel="next" href="locking.html" title="Chapter 17. File and Record Locking"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 16. File, Directory, and Share Access Controls</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="rights.html">Prev</a> </td><th width="60%" align="center">Part III. Advanced Configuration</th><td width="20%" align="right"> <a accesskey="n" href="locking.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="AccessControls"></a>Chapter 16. File, Directory, and Share Access Controls</h2></div><div><div class="author"><h3 class="author"><span class="firstname">John</span> <span class="othername">H.</span> <span class="orgname">Samba Team</span> <span class="surname">Terpstra</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jht@samba.org">jht@samba.org</a>></code></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">Jeremy</span> <span class="orgname">Samba Team</span> <span class="surname">Allison</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jra@samba.org">jra@samba.org</a>></code></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">Jelmer</span> <span class="othername">R.</span> <span class="orgname">The Samba Team</span> <span class="surname">Vernooij</span></h3><span class="contrib">drawing</span> <div class="affiliation"><span class="orgname">The Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jelmer@samba.org">jelmer@samba.org</a>></code></p></div></div></div></div><div><p class="pubdate">May 10, 2003</p></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="AccessControls.html#id2610573">Features and Benefits</a></span></dt><dt><span class="sect1"><a href="AccessControls.html#id2610760">File System Access Controls</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2610774">MS Windows NTFS Comparison with UNIX File Systems</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2611116">Managing Directories</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2611240">File and Directory Access Control</a></span></dt></dl></dd><dt><span class="sect1"><a href="AccessControls.html#id2611906">Share Definition Access Controls</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2611939">User- and Group-Based Controls</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2612307">File and Directory Permissions-Based Controls</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2612644">Miscellaneous Controls</a></span></dt></dl></dd><dt><span class="sect1"><a href="AccessControls.html#id2612982">Access Controls on Shares</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2613130">Share Permissions Management</a></span></dt></dl></dd><dt><span class="sect1"><a href="AccessControls.html#id2613477">MS Windows Access Control Lists and UNIX Interoperability</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2613483">Managing UNIX Permissions Using NT Security Dialogs</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2613530">Viewing File Security on a Samba Share</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2613601">Viewing File Ownership</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2613745">Viewing File or Directory Permissions</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2613960">Modifying File or Directory Permissions</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2614117">Interaction with the Standard Samba create mask Parameters</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2614486">Interaction with the Standard Samba File Attribute Mapping</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2614559">Windows NT/200X ACLs and POSIX ACLs Limitations</a></span></dt></dl></dd><dt><span class="sect1"><a href="AccessControls.html#id2614978">Common Errors</a></span></dt><dd><dl><dt><span class="sect2"><a href="AccessControls.html#id2614990">Users Cannot Write to a Public Share</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2615312">File Operations Done as root with force user Set</a></span></dt><dt><span class="sect2"><a href="AccessControls.html#id2615358">MS Word with Samba Changes Owner of File</a></span></dt></dl></dd></dl></div><p> 2 <a class="indexterm" name="id2610404"></a> 3 3 <a class="indexterm" name="id2610410"></a> 4 4 <a class="indexterm" name="id2610417"></a> … … 9 9 provide users with the access they need while protecting resources from unauthorized access. 10 10 </p><p> 11 <a class="indexterm" name="id261044 0"></a>11 <a class="indexterm" name="id2610441"></a> 12 12 <a class="indexterm" name="id2610448"></a> 13 13 Many UNIX administrators are unfamiliar with the MS Windows environment and in particular … … 23 23 though it does try to bridge the chasm to a degree. 24 24 </p><p> 25 <a class="indexterm" name="id261049 5"></a>25 <a class="indexterm" name="id2610496"></a> 26 26 <a class="indexterm" name="id2610502"></a> 27 27 <a class="indexterm" name="id2610512"></a> 28 <a class="indexterm" name="id261051 8"></a>28 <a class="indexterm" name="id2610519"></a> 29 29 POSIX Access Control List technology has been available (along with extended attributes) 30 30 for UNIX for many years, yet there is little evidence today of any significant use. This … … 53 53 </p><p> 54 54 <a class="indexterm" name="id2610610"></a> 55 <a class="indexterm" name="id261061 7"></a>55 <a class="indexterm" name="id2610618"></a> 56 56 <a class="indexterm" name="id2610624"></a> 57 57 Samba honors and implements UNIX file system access controls. Users … … 65 65 <span class="emphasis"><em>Samba Share Definitions</em></span> 66 66 </p><p> 67 <a class="indexterm" name="id261065 2"></a>67 <a class="indexterm" name="id2610653"></a> 68 68 In configuring share settings and controls in the <code class="filename">smb.conf</code> file, 69 69 the network administrator can exercise overrides to native file … … 95 95 extended attributes enabled. This chapter has pertinent information 96 96 for users of platforms that support them. 97 </p></li></ul></div></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id26107 59"></a>File System Access Controls</h2></div></div></div><p>97 </p></li></ul></div></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2610760"></a>File System Access Controls</h2></div></div></div><p> 98 98 Perhaps the most important recognition to be made is the simple fact that MS Windows NT4/200x/XP 99 99 implement a totally divergent file system technology from what is provided in the UNIX operating system … … 102 102 </p><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2610774"></a>MS Windows NTFS Comparison with UNIX File Systems</h3></div></div></div><p> 103 103 <a class="indexterm" name="id2610783"></a> 104 <a class="indexterm" name="id26107 89"></a>104 <a class="indexterm" name="id2610790"></a> 105 105 <a class="indexterm" name="id2610796"></a> 106 <a class="indexterm" name="id261080 5"></a>106 <a class="indexterm" name="id2610806"></a> 107 107 Samba operates on top of the UNIX file system. This means it is subject to UNIX file system conventions 108 108 and permissions. It also means that if the MS Windows networking environment requires file system … … 169 169 startup configuration data. 170 170 </p></dd><dt><span class="term">Links and Short-Cuts</span></dt><dd><p> 171 <a class="indexterm" name="id261105 7"></a>171 <a class="indexterm" name="id2611058"></a> 172 172 <a class="indexterm" name="id2611067"></a> 173 173 <a class="indexterm" name="id2611076"></a> … … 250 250 <a class="indexterm" name="id2611516"></a> 251 251 <a class="indexterm" name="id2611523"></a> 252 <a class="indexterm" name="id26115 29"></a>252 <a class="indexterm" name="id2611530"></a> 253 253 The letters <code class="constant">rwxXst</code> set permissions for the user, group, and others as read (r), write (w), 254 254 execute (or access for directories) (x), execute only if the file is a directory or already has execute … … 258 258 <a class="indexterm" name="id2611555"></a> 259 259 <a class="indexterm" name="id2611562"></a> 260 <a class="indexterm" name="id261156 8"></a>260 <a class="indexterm" name="id2611569"></a> 261 261 When the sticky bit is set on a directory, files in that directory may be unlinked (deleted) or renamed only by root or their owner. 262 262 Without the sticky bit, anyone able to write to the directory can delete or rename files. The sticky bit is commonly found on … … 289 289 directory that contains a file and has write permission for it has the capability to delete it. 290 290 </p><p> 291 <a class="indexterm" name="id261170 2"></a>291 <a class="indexterm" name="id2611703"></a> 292 292 <a class="indexterm" name="id2611710"></a> 293 <a class="indexterm" name="id261171 6"></a>293 <a class="indexterm" name="id2611717"></a> 294 294 For the record, in the UNIX environment the ability to delete a file is controlled by the permissions on 295 295 the directory that the file is in. In other words, a user can delete a file in a directory to which that 296 296 user has write access, even if that user does not own the file. 297 297 </p><p> 298 <a class="indexterm" name="id261173 1"></a>299 <a class="indexterm" name="id261173 8"></a>298 <a class="indexterm" name="id2611732"></a> 299 <a class="indexterm" name="id2611739"></a> 300 300 <a class="indexterm" name="id2611745"></a> 301 301 <a class="indexterm" name="id2611752"></a> … … 452 452 </p></td></tr></tbody></table></div></div><br class="table-break"></div></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2612982"></a>Access Controls on Shares</h2></div></div></div><p> 453 453 <a class="indexterm" name="id2612990"></a> 454 <a class="indexterm" name="id261299 6"></a>454 <a class="indexterm" name="id2612997"></a> 455 455 <a class="indexterm" name="id2613004"></a> 456 456 <a class="indexterm" name="id2613011"></a> … … 473 473 <a class="indexterm" name="id2613078"></a> 474 474 <a class="indexterm" name="id2613085"></a> 475 <a class="indexterm" name="id261309 1"></a>475 <a class="indexterm" name="id2613092"></a> 476 476 Samba stores the per-share access control settings in a file called <code class="filename">share_info.tdb</code>. 477 477 The location of this file on your system will depend on how Samba was compiled. The default location … … 482 482 The best tool for share permissions management is platform-dependent. Choose the best tool for your environment. 483 483 </p><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="id2613141"></a>Windows NT4 Workstation/Server</h4></div></div></div><p> 484 <a class="indexterm" name="id26131 49"></a>485 <a class="indexterm" name="id261315 6"></a>486 <a class="indexterm" name="id261316 3"></a>484 <a class="indexterm" name="id2613150"></a> 485 <a class="indexterm" name="id2613157"></a> 486 <a class="indexterm" name="id2613164"></a> 487 487 <a class="indexterm" name="id2613170"></a> 488 488 The tool you need to manage share permissions on a Samba server from a Windows NT4 Workstation or Server … … 497 497 Click on the share that you wish to manage and click the <span class="guilabel">Properties</span> tab, then click 498 498 the <span class="guilabel">Permissions</span> tab. Now you can add or change access control settings as you wish. 499 </p></li></ol></div></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="id261324 6"></a>Windows 200x/XP</h4></div></div></div><p>499 </p></li></ol></div></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="id2613247"></a>Windows 200x/XP</h4></div></div></div><p> 500 500 <a class="indexterm" name="id2613254"></a> 501 501 <a class="indexterm" name="id2613261"></a> … … 524 524 <span class="guilabel">Shared Folders</span> in the left panel. 525 525 </p></li><li><p> 526 <a class="indexterm" name="id261342 6"></a>526 <a class="indexterm" name="id2613427"></a> 527 527 In the right panel, double-click on the share on which you wish to set access control permissions. 528 528 Then click the tab <span class="guilabel">Share Permissions</span>. It is now possible to add access control entities … … 590 590 or remote mounted NTFS or Samba drive. This is available as part of the <span class="application">Seclib</span> NT 591 591 security library written by Jeremy Allison of the Samba Team and is downloadable from the main Samba FTP site. 592 </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id261374 4"></a>Viewing File or Directory Permissions</h3></div></div></div><p>592 </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2613745"></a>Viewing File or Directory Permissions</h3></div></div></div><p> 593 593 The third button is the <span class="guibutton">Permissions</span> button. Clicking on it brings up a dialog box 594 594 that shows both the permissions and the UNIX owner of the file or directory. The owner is displayed like this: … … 828 828 File, directory, and share access problems are common topics on the mailing list. The following 829 829 are examples recently taken from the mailing list. 830 </p><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id26149 89"></a>Users Cannot Write to a Public Share</h3></div></div></div><p>830 </p><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2614990"></a>Users Cannot Write to a Public Share</h3></div></div></div><p> 831 831 The following complaint has frequently been voiced on the Samba mailing list: 832 832 “<span class="quote">
Note:
See TracChangeset
for help on using the changeset viewer.
