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r599 r736 1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 39. Analyzing and Solving Samba Problems</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="The Official Samba 3.5.x HOWTO and Reference Guide"><link rel="up" href="troubleshooting.html" title="Part V. Troubleshooting"><link rel="prev" href="diagnosis.html" title="Chapter 38. The Samba Checklist"><link rel="next" href="bugreport.html" title="Chapter 40. Reporting Bugs"></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 39. Analyzing and Solving Samba Problems</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="diagnosis.html">Prev</a> </td><th width="60%" align="center">Part V. Troubleshooting</th><td width="20%" align="right"> <a accesskey="n" href="bugreport.html">Next</a></td></tr></table><hr></div><div class="chapter" title="Chapter 39. Analyzing and Solving Samba Problems"><div class="titlepage"><div><div><h2 class="title"><a name="problems"></a>Chapter 39. Analyzing and Solving Samba Problems</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Gerald</span> <span class="othername">(Jerry)</span> <span class="surname">Carter</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jerry@samba.org">jerry@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="surname">Vernooij</span></h3><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><div class="author"><h3 class="author"><span class="firstname">David</span> <span class="surname">Bannon</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:dbannon@samba.org">dbannon@samba.org</a>></code></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">Dan</span> <span class="surname">Shearer</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:dan@samba.org">dan@samba.org</a>></code></p></div></div></div></div><div><p class="pubdate">8 Apr 2003</p></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="problems.html#id44677 6">Diagnostics Tools</a></span></dt><dd><dl><dt><span class="sect2"><a href="problems.html#id446825">Debugging with Samba Itself</a></span></dt><dt><span class="sect2"><a href="problems.html#id447068">Tcpdump</a></span></dt><dt><span class="sect2"><a href="problems.html#id447117">Ethereal</a></span></dt><dt><span class="sect2"><a href="problems.html#id447257">The Windows Network Monitor</a></span></dt></dl></dd><dt><span class="sect1"><a href="problems.html#id447562">Useful URLs</a></span></dt><dt><span class="sect1"><a href="problems.html#id447597">Getting Mailing List Help</a></span></dt><dt><span class="sect1"><a href="problems.html#id447752">How to Get Off the Mailing Lists</a></span></dt></dl></div><p>2 <a class="indexterm" name="id44675 2"></a>3 <a class="indexterm" name="id44675 9"></a>4 <a class="indexterm" name="id44676 5"></a>1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 39. Analyzing and Solving Samba Problems</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="The Official Samba 3.5.x HOWTO and Reference Guide"><link rel="up" href="troubleshooting.html" title="Part V. Troubleshooting"><link rel="prev" href="diagnosis.html" title="Chapter 38. The Samba Checklist"><link rel="next" href="bugreport.html" title="Chapter 40. Reporting Bugs"></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 39. Analyzing and Solving Samba Problems</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="diagnosis.html">Prev</a> </td><th width="60%" align="center">Part V. Troubleshooting</th><td width="20%" align="right"> <a accesskey="n" href="bugreport.html">Next</a></td></tr></table><hr></div><div class="chapter" title="Chapter 39. Analyzing and Solving Samba Problems"><div class="titlepage"><div><div><h2 class="title"><a name="problems"></a>Chapter 39. Analyzing and Solving Samba Problems</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Gerald</span> <span class="othername">(Jerry)</span> <span class="surname">Carter</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:jerry@samba.org">jerry@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="surname">Vernooij</span></h3><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><div class="author"><h3 class="author"><span class="firstname">David</span> <span class="surname">Bannon</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:dbannon@samba.org">dbannon@samba.org</a>></code></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">Dan</span> <span class="surname">Shearer</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:dan@samba.org">dan@samba.org</a>></code></p></div></div></div></div><div><p class="pubdate">8 Apr 2003</p></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="problems.html#id446773">Diagnostics Tools</a></span></dt><dd><dl><dt><span class="sect2"><a href="problems.html#id446822">Debugging with Samba Itself</a></span></dt><dt><span class="sect2"><a href="problems.html#id447066">Tcpdump</a></span></dt><dt><span class="sect2"><a href="problems.html#id447115">Ethereal</a></span></dt><dt><span class="sect2"><a href="problems.html#id447254">The Windows Network Monitor</a></span></dt></dl></dd><dt><span class="sect1"><a href="problems.html#id447560">Useful URLs</a></span></dt><dt><span class="sect1"><a href="problems.html#id447595">Getting Mailing List Help</a></span></dt><dt><span class="sect1"><a href="problems.html#id447749">How to Get Off the Mailing Lists</a></span></dt></dl></div><p> 2 <a class="indexterm" name="id446750"></a> 3 <a class="indexterm" name="id446756"></a> 4 <a class="indexterm" name="id446763"></a> 5 5 There are many sources of information available in the form of mailing lists, RFCs, and documentation. The 6 6 documentation that comes with the Samba distribution contains good explanations of general SMB topics such as 7 7 browsing. 8 </p><div class="sect1" title="Diagnostics Tools"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id44677 6"></a>Diagnostics Tools</h2></div></div></div><p>9 <a class="indexterm" name="id44678 3"></a>10 <a class="indexterm" name="id4467 90"></a>11 <a class="indexterm" name="id44679 7"></a>12 <a class="indexterm" name="id44680 4"></a>13 <a class="indexterm" name="id4468 10"></a>8 </p><div class="sect1" title="Diagnostics Tools"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id446773"></a>Diagnostics Tools</h2></div></div></div><p> 9 <a class="indexterm" name="id446781"></a> 10 <a class="indexterm" name="id446788"></a> 11 <a class="indexterm" name="id446794"></a> 12 <a class="indexterm" name="id446801"></a> 13 <a class="indexterm" name="id446808"></a> 14 14 With SMB networking, it is often not immediately clear what the cause is of a certain problem. Samba itself 15 15 provides rather useful information, but in some cases you might have to fall back to using a 16 16 <span class="emphasis"><em>sniffer</em></span>. A sniffer is a program that listens on your LAN, analyzes the data sent on it, 17 17 and displays it on the screen. 18 </p><div class="sect2" title="Debugging with Samba Itself"><div class="titlepage"><div><div><h3 class="title"><a name="id44682 5"></a>Debugging with Samba Itself</h3></div></div></div><p>19 <a class="indexterm" name="id44683 2"></a>20 <a class="indexterm" name="id44683 9"></a>21 <a class="indexterm" name="id44684 6"></a>22 <a class="indexterm" name="id44685 3"></a>23 <a class="indexterm" name="id4468 60"></a>24 <a class="indexterm" name="id44686 6"></a>25 <a class="indexterm" name="id44687 3"></a>18 </p><div class="sect2" title="Debugging with Samba Itself"><div class="titlepage"><div><div><h3 class="title"><a name="id446822"></a>Debugging with Samba Itself</h3></div></div></div><p> 19 <a class="indexterm" name="id446830"></a> 20 <a class="indexterm" name="id446837"></a> 21 <a class="indexterm" name="id446844"></a> 22 <a class="indexterm" name="id446850"></a> 23 <a class="indexterm" name="id446857"></a> 24 <a class="indexterm" name="id446864"></a> 25 <a class="indexterm" name="id446871"></a> 26 26 One of the best diagnostic tools for debugging problems is Samba itself. You can use the <code class="option">-d 27 27 option</code> for both <span class="application">smbd</span> and <span class="application">nmbd</span> to specify the <a class="link" href="smb.conf.5.html#DEBUGLEVEL" target="_top">debug level</a> at which to run. … … 29 29 options. The debug level (log level) can range from 1 (the default) to 10 (100 for debugging passwords). 30 30 </p><p> 31 <a class="indexterm" name="id44692 4"></a>32 <a class="indexterm" name="id4469 31"></a>33 <a class="indexterm" name="id44693 8"></a>34 <a class="indexterm" name="id44694 5"></a>35 <a class="indexterm" name="id4469 52"></a>36 <a class="indexterm" name="id44695 9"></a>37 <a class="indexterm" name="id44696 5"></a>31 <a class="indexterm" name="id446922"></a> 32 <a class="indexterm" name="id446929"></a> 33 <a class="indexterm" name="id446936"></a> 34 <a class="indexterm" name="id446943"></a> 35 <a class="indexterm" name="id446949"></a> 36 <a class="indexterm" name="id446956"></a> 37 <a class="indexterm" name="id446963"></a> 38 38 Another helpful method of debugging is to compile Samba using the <code class="literal">gcc -g </code> flag. This will 39 39 include debug information in the binaries and allow you to attach <code class="literal">gdb</code> to the running … … 47 47 </p><p> 48 48 Some useful Samba commands worth investigating are: 49 <a class="indexterm" name="id44702 7"></a>50 <a class="indexterm" name="id44703 4"></a>49 <a class="indexterm" name="id447024"></a> 50 <a class="indexterm" name="id447031"></a> 51 51 </p><pre class="screen"> 52 52 <code class="prompt">$ </code><strong class="userinput"><code>testparm | more</code></strong> 53 53 <code class="prompt">$ </code><strong class="userinput"><code>smbclient -L //{netbios name of server}</code></strong> 54 54 </pre><p> 55 </p></div><div class="sect2" title="Tcpdump"><div class="titlepage"><div><div><h3 class="title"><a name="id44706 8"></a>Tcpdump</h3></div></div></div><p>56 <a class="indexterm" name="id44707 6"></a>57 <a class="indexterm" name="id44708 3"></a>58 <a class="indexterm" name="id4470 90"></a>55 </p></div><div class="sect2" title="Tcpdump"><div class="titlepage"><div><div><h3 class="title"><a name="id447066"></a>Tcpdump</h3></div></div></div><p> 56 <a class="indexterm" name="id447074"></a> 57 <a class="indexterm" name="id447081"></a> 58 <a class="indexterm" name="id447087"></a> 59 59 <a class="ulink" href="http://www.tcpdump.org/" target="_top">Tcpdump</a> was the first 60 60 UNIX sniffer with SMB support. It is a command-line utility and 61 61 now, its SMB support is somewhat lagging that of <code class="literal">ethereal</code> 62 62 and <code class="literal">tethereal</code>. 63 </p></div><div class="sect2" title="Ethereal"><div class="titlepage"><div><div><h3 class="title"><a name="id44711 7"></a>Ethereal</h3></div></div></div><p>64 <a class="indexterm" name="id44712 5"></a>63 </p></div><div class="sect2" title="Ethereal"><div class="titlepage"><div><div><h3 class="title"><a name="id447115"></a>Ethereal</h3></div></div></div><p> 64 <a class="indexterm" name="id447123"></a> 65 65 <a class="ulink" href="http://www.ethereal.com/" target="_top">Ethereal</a> is a graphical sniffer, available for both UNIX (Gtk) 66 66 and Windows. Ethereal's SMB support is quite good. For details on the use of <code class="literal">ethereal</code>, read 67 67 the well-written Ethereal User Guide. 68 68 </p><div class="figure"><a name="ethereal1"></a><p class="title"><b>Figure 39.1. Starting a Capture.</b></p><div class="figure-contents"><div class="mediaobject"><img src="images/ethereal1.png" alt="Starting a Capture."></div></div></div><br class="figure-break"><p> 69 <a class="indexterm" name="id44718 6"></a>69 <a class="indexterm" name="id447184"></a> 70 70 Listen for data on ports 137, 138, 139, and 445. For example, use the filter <strong class="userinput"><code>port 137, port 138, 71 71 port 139, or port 445</code></strong> as seen in <a class="link" href="problems.html#ethereal1" title="Figure 39.1. Starting a Capture.">Starting a Capture</a> snapshot. 72 72 </p><p> 73 73 A console version of ethereal is available as well and is called <code class="literal">tethereal</code>. 74 </p><div class="figure"><a name="ethereal2"></a><p class="title"><b>Figure 39.2. Main Ethereal Data Window.</b></p><div class="figure-contents"><div class="mediaobject"><img src="images/ethereal2.png" alt="Main Ethereal Data Window."></div></div></div><br class="figure-break"></div><div class="sect2" title="The Windows Network Monitor"><div class="titlepage"><div><div><h3 class="title"><a name="id44725 7"></a>The Windows Network Monitor</h3></div></div></div><p>75 <a class="indexterm" name="id44726 4"></a>76 <a class="indexterm" name="id4472 71"></a>77 <a class="indexterm" name="id44727 8"></a>78 <a class="indexterm" name="id44728 5"></a>79 <a class="indexterm" name="id4472 92"></a>80 <a class="indexterm" name="id44729 8"></a>74 </p><div class="figure"><a name="ethereal2"></a><p class="title"><b>Figure 39.2. Main Ethereal Data Window.</b></p><div class="figure-contents"><div class="mediaobject"><img src="images/ethereal2.png" alt="Main Ethereal Data Window."></div></div></div><br class="figure-break"></div><div class="sect2" title="The Windows Network Monitor"><div class="titlepage"><div><div><h3 class="title"><a name="id447254"></a>The Windows Network Monitor</h3></div></div></div><p> 75 <a class="indexterm" name="id447262"></a> 76 <a class="indexterm" name="id447269"></a> 77 <a class="indexterm" name="id447276"></a> 78 <a class="indexterm" name="id447283"></a> 79 <a class="indexterm" name="id447289"></a> 80 <a class="indexterm" name="id447296"></a> 81 81 For tracing things on Microsoft Windows NT, Network Monitor (aka Netmon) is available on Microsoft Developer 82 82 Network CDs, the Windows NT Server install CD, and the SMS CDs. The version of Netmon that ships with SMS … … 85 85 local NT box and broadcasts on the local subnet. Be aware that Ethereal can read and write Netmon formatted 86 86 files. 87 </p><div class="sect3" title="Installing Network Monitor on an NT Workstation"><div class="titlepage"><div><div><h4 class="title"><a name="id4473 11"></a>Installing Network Monitor on an NT Workstation</h4></div></div></div><p>88 <a class="indexterm" name="id44731 9"></a>87 </p><div class="sect3" title="Installing Network Monitor on an NT Workstation"><div class="titlepage"><div><div><h4 class="title"><a name="id447308"></a>Installing Network Monitor on an NT Workstation</h4></div></div></div><p> 88 <a class="indexterm" name="id447316"></a> 89 89 Installing Netmon on an NT workstation requires a couple of steps. The following are instructions for 90 90 installing Netmon V4.00.349, which comes with Microsoft Windows NT Server 4.0, on Microsoft Windows NT … … 92 92 need both the Microsoft Windows NT Server 4.0 Install CD and the Workstation 4.0 Install CD. 93 93 </p><p> 94 <a class="indexterm" name="id44733 2"></a>94 <a class="indexterm" name="id447330"></a> 95 95 Initially you will need to install <span class="application">Network Monitor Tools and Agent</span> 96 96 on the NT Server to do this: … … 111 111 to <code class="filename">%SYSTEMROOT%\System32\netmon</code> on the workstation and set permissions 112 112 as you deem appropriate for your site. You will need administrative rights on the NT box to run Netmon. 113 </p></div><div class="sect3" title="Installing Network Monitor on Windows 9x/Me"><div class="titlepage"><div><div><h4 class="title"><a name="id4475 42"></a>Installing Network Monitor on Windows 9x/Me</h4></div></div></div><p>113 </p></div><div class="sect3" title="Installing Network Monitor on Windows 9x/Me"><div class="titlepage"><div><div><h4 class="title"><a name="id447539"></a>Installing Network Monitor on Windows 9x/Me</h4></div></div></div><p> 114 114 To install Netmon on Windows 9x/Me, install the Network Monitor Agent 115 115 from the Windows 9x/Me CD (<code class="filename">\admin\nettools\netmon</code>). 116 116 There is a readme file included with the Netmon driver files on the CD if you need 117 117 information on how to do this. Copy the files from a working Netmon installation. 118 </p></div></div></div><div class="sect1" title="Useful URLs"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id44756 2"></a>Useful URLs</h2></div></div></div><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>See how Scott Merrill simulates a BDC behavior at118 </p></div></div></div><div class="sect1" title="Useful URLs"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id447560"></a>Useful URLs</h2></div></div></div><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>See how Scott Merrill simulates a BDC behavior at 119 119 <a class="ulink" href="http://www.skippy.net/linux/smb-howto.html" target="_top"> 120 120 http://www.skippy.net/linux/smb-howto.html</a>. </p></li><li class="listitem"><p>FTP site for older SMB specs, 121 121 <a class="ulink" href="ftp://ftp.microsoft.com/developr/drg/CIFS/" target="_top"> 122 ftp://ftp.microsoft.com/developr/drg/CIFS/</a></p></li></ul></div></div><div class="sect1" title="Getting Mailing List Help"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id44759 7"></a>Getting Mailing List Help</h2></div></div></div><p>122 ftp://ftp.microsoft.com/developr/drg/CIFS/</a></p></li></ul></div></div><div class="sect1" title="Getting Mailing List Help"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id447595"></a>Getting Mailing List Help</h2></div></div></div><p> 123 123 There are a number of Samba-related mailing lists. Go to <a class="ulink" href="http://samba.org" target="_top">http://samba.org</a>, click on your nearest mirror, 124 124 and then click on <code class="literal">Support</code>. Next, click on <code class="literal"> … … 131 131 If you do post a message to one of the lists, please observe the following guidelines: 132 132 </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p> 133 <a class="indexterm" name="id44764 9"></a>133 <a class="indexterm" name="id447646"></a> 134 134 Always remember that the developers are volunteers; they are 135 135 not paid and they never guarantee to produce a particular feature at 136 136 a particular time. Any timelines are <span class="quote">“<span class="quote">best guess,</span>”</span> and nothing more. 137 137 </p></li><li class="listitem"><p> 138 <a class="indexterm" name="id44766 5"></a>138 <a class="indexterm" name="id447663"></a> 139 139 Always mention what version of Samba you are using and what 140 140 operating system it's running under. You should list the relevant sections of … … 151 151 with such bad netiquet bahavior. 152 152 </p></li><li class="listitem"><p> 153 <a class="indexterm" name="id4477 11"></a>153 <a class="indexterm" name="id447709"></a> 154 154 Don't cross post. Work out which is the best list to post to 155 155 and see what happens. Do not post to both samba-ntdom and samba-technical. … … 164 164 Consider pasting the relevant parts into the body of the message. The Samba 165 165 mailing lists go to a huge number of people. Do they all need a copy of your 166 <code class="filename">smb.conf</code> in their attach directory?</p></li></ul></div></div><div class="sect1" title="How to Get Off the Mailing Lists"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id4477 52"></a>How to Get Off the Mailing Lists</h2></div></div></div><p>To have your name removed from a Samba mailing list, go to the same166 <code class="filename">smb.conf</code> in their attach directory?</p></li></ul></div></div><div class="sect1" title="How to Get Off the Mailing Lists"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id447749"></a>How to Get Off the Mailing Lists</h2></div></div></div><p>To have your name removed from a Samba mailing list, go to the same 167 167 place where you went to 168 168 subscribe to it, go to <a class="ulink" href="http://lists.samba.org/" target="_top">http://lists.samba.org</a>,
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