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+<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 33. The Samba checklist</title><link rel="stylesheet" href="samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.60.1"><link rel="home" href="samba-doc.html" title="SAMBA Project Documentation"><link rel="up" href="troubleshooting.html" title="Part V. Troubleshooting"><link rel="previous" href="troubleshooting.html" title="Part V. Troubleshooting"><link rel="next" href="problems.html" title="Chapter 34. Analysing and solving samba problems"></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 33. The Samba checklist</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="troubleshooting.html">Prev</a> </td><th width="60%" align="center">Part V. Troubleshooting</th><td width="20%" align="right"> <a accesskey="n" href="problems.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="diagnosis"></a>Chapter 33. The Samba checklist</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Andrew</span> <span class="surname">Tridgell</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><tt class="email">&lt;<a href="mailto:tridge@samba.org">tridge@samba.org</a>&gt;</tt></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><tt class="email">&lt;<a href="mailto:jelmer@samba.org">jelmer@samba.org</a>&gt;</tt></p></div></div></div></div><div><p class="pubdate">Wed Jan 15</p></div></div><div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><a href="diagnosis.html#id2957982">Introduction</a></dt><dt><a href="diagnosis.html#id2958022">Assumptions</a></dt><dt><a href="diagnosis.html#id2958249">The tests</a></dt></dl></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2957982"></a>Introduction</h2></div></div><div></div></div><p>
+This file contains a list of tests you can perform to validate your
+Samba server. It also tells you what the likely cause of the problem
+is if it fails any one of these steps. If it passes all these tests
+then it is probably working fine.
+</p><p>
+You should do ALL the tests, in the order shown. We have tried to
+carefully choose them so later tests only use capabilities verified in
+the earlier tests. However, do not stop at the first error as there
+have been some instances when continuing with the tests has helped
+to solve a problem.
+</p><p>
+If you send one of the samba mailing lists an email saying &quot;it doesn't work&quot;
+and you have not followed this test procedure then you should not be surprised
+if your email is ignored.
+</p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2958022"></a>Assumptions</h2></div></div><div></div></div><p>
+In all of the tests it is assumed you have a Samba server called
+BIGSERVER and a PC called ACLIENT both in workgroup TESTGROUP.
+</p><p>
+The procedure is similar for other types of clients.
+</p><p>
+It is also assumed you know the name of an available share in your
+<tt class="filename">smb.conf</tt>. I will assume this share is called <i class="replaceable"><tt>tmp</tt></i>.
+You can add a <i class="replaceable"><tt>tmp</tt></i> share like this by adding the
+following to <tt class="filename">smb.conf</tt>:
+</p><div class="example"><a name="id2958071"></a><p class="title"><b>Example 33.1. smb.conf with [tmp] share</b></p><table class="simplelist" border="0" summary="Simple list"><tr><td> </td></tr><tr><td><i class="parameter"><tt>[tmp]</tt></i></td></tr><tr><td><i class="parameter"><tt>comment = temporary files </tt></i></td></tr><tr><td><i class="parameter"><tt>path = /tmp</tt></i></td></tr><tr><td><i class="parameter"><tt>read only = yes</tt></i></td></tr></table></div><p>
+</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>
+These tests assume version 3.0 or later of the samba suite.
+Some commands shown did not exist in earlier versions.
+</p></div><p>
+Please pay attention to the error messages you receive. If any error message
+reports that your server is being unfriendly you should first check that your
+IP name resolution is correctly set up. eg: Make sure your <tt class="filename">/etc/resolv.conf</tt>
+file points to name servers that really do exist.
+</p><p>
+Also, if you do not have DNS server access for name resolution please check
+that the settings for your <tt class="filename">smb.conf</tt> file results in <b class="command">dns proxy = no</b>. The
+best way to check this is with <b class="userinput"><tt>testparm smb.conf</tt></b>.
+</p><a class="indexterm" name="id2958171"></a><p>
+It is helpful to monitor the log files during testing by using the
+<b class="command">tail -F <i class="replaceable"><tt>log_file_name</tt></i></b> in a separate
+terminal console (use ctrl-alt-F1 through F6 or multiple terminals in X).
+Relevant log files can be found (for default installations) in
+<tt class="filename">/usr/local/samba/var</tt>. Also, connection logs from
+machines can be found here or possibly in <tt class="filename">/var/log/samba</tt>
+depending on how or if you specified logging in your <tt class="filename">smb.conf</tt> file.
+</p><p>
+If you make changes to your <tt class="filename">smb.conf</tt> file while going through these test,
+don't forget to restart <span class="application">smbd</span> and <span class="application">nmbd</span>.
+</p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2958249"></a>The tests</h2></div></div><div></div></div><div class="procedure"><p class="title"><b>Procedure 33.1. Diagnosing your samba server</b></p><a class="indexterm" name="id2958265"></a><ol type="1"><li><p>
+In the directory in which you store your <tt class="filename">smb.conf</tt> file, run the command
+<b class="userinput"><tt>testparm smb.conf</tt></b>. If it reports any errors then your <tt class="filename">smb.conf</tt>
+configuration file is faulty.
+</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>
+Your <tt class="filename">smb.conf</tt> file may be located in: <tt class="filename">/etc/samba</tt>
+Or in: <tt class="filename">/usr/local/samba/lib</tt>
+</p></div></li><li><p>
+Run the command <b class="userinput"><tt>ping BIGSERVER</tt></b> from the PC and
+<b class="userinput"><tt>ping ACLIENT</tt></b> from
+the unix box. If you don't get a valid response then your TCP/IP
+software is not correctly installed.
+</p><p>
+Note that you will need to start a &quot;dos prompt&quot; window on the PC to
+run ping.
+</p><p>
+If you get a message saying <span class="errorname">host not found</span> or similar then your DNS
+software or <tt class="filename">/etc/hosts</tt> file is not correctly setup.
+It is possible to
+run samba without DNS entries for the server and client, but I assume
+you do have correct entries for the remainder of these tests.
+</p><p>
+Another reason why ping might fail is if your host is running firewall
+software. You will need to relax the rules to let in the workstation
+in question, perhaps by allowing access from another subnet (on Linux
+this is done via the <span class="application">ipfwadm</span> program.)
+</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>
+Modern Linux distributions install ipchains/iptables by default.
+This is a common problem that is often overlooked.
+</p></div></li><li><p>
+Run the command <b class="userinput"><tt>smbclient -L BIGSERVER</tt></b> on the unix box. You
+should get a list of available shares back.
+</p><p>
+If you get a error message containing the string &quot;Bad password&quot; then
+you probably have either an incorrect <b class="command">hosts allow</b>,
+<b class="command">hosts deny</b> or <b class="command">valid users</b> line in your
+<tt class="filename">smb.conf</tt>, or your guest account is not
+valid. Check what your guest account is using <span class="application">testparm</span> and
+temporarily remove any <b class="command">hosts allow</b>, <b class="command">hosts deny</b>, <b class="command">valid users</b> or <b class="command">invalid users</b> lines.
+</p><p>
+If you get a <span class="errorname">connection refused</span> response then the smbd server may
+not be running. If you installed it in inetd.conf then you probably edited
+that file incorrectly. If you installed it as a daemon then check that
+it is running, and check that the netbios-ssn port is in a LISTEN
+state using <b class="userinput"><tt>netstat -a</tt></b>.
+</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>
+<a class="indexterm" name="id2958530"></a>
+<a class="indexterm" name="id2958538"></a>
+Some Unix / Linux systems use <b class="command">xinetd</b> in place of
+<b class="command">inetd</b>. Check your system documentation for the location
+of the control file/s for your particular system implementation of
+this network super daemon.
+</p></div><p>
+If you get a <span class="errorname">session request failed</span> then the server refused the
+connection. If it says &quot;Your server software is being unfriendly&quot; then
+its probably because you have invalid command line parameters to <span class="application">smbd</span>,
+or a similar fatal problem with the initial startup of <span class="application">smbd</span>. Also
+check your config file (<tt class="filename">smb.conf</tt>) for syntax errors with <span class="application">testparm</span>
+and that the various directories where samba keeps its log and lock
+files exist.
+</p><p>
+There are a number of reasons for which smbd may refuse or decline
+a session request. The most common of these involve one or more of
+the following <tt class="filename">smb.conf</tt> file entries:
+</p><table class="simplelist" border="0" summary="Simple list"><tr><td><i class="parameter"><tt>hosts deny = ALL</tt></i></td></tr><tr><td><i class="parameter"><tt>hosts allow = xxx.xxx.xxx.xxx/yy</tt></i></td></tr><tr><td><i class="parameter"><tt>bind interfaces only = Yes</tt></i></td></tr></table><p>
+In the above, no allowance has been made for any session requests that
+will automatically translate to the loopback adapter address 127.0.0.1.
+To solve this problem change these lines to:
+</p><table class="simplelist" border="0" summary="Simple list"><tr><td><i class="parameter"><tt>hosts deny = ALL</tt></i></td></tr><tr><td><i class="parameter"><tt>hosts allow = xxx.xxx.xxx.xxx/yy 127.</tt></i></td></tr></table><p>
+Do <span class="emphasis"><em>not</em></span> use the <a class="indexterm" name="id2958698"></a><i class="parameter"><tt>bind interfaces only</tt></i> parameter where you
+may wish to
+use the samba password change facility, or where <span class="application">smbclient</span> may need to
+access a local service for name resolution or for local resource
+connections. (Note: the <a class="indexterm" name="id2958724"></a><i class="parameter"><tt>bind interfaces only</tt></i> parameter deficiency
+where it will not allow connections to the loopback address will be
+fixed soon).
+</p><p>
+<a class="indexterm" name="id2958744"></a>
+Another common cause of these two errors is having something already running
+on port <tt class="constant">139</tt>, such as Samba
+(ie: <span class="application">smbd</span> is running from <span class="application">inetd</span> already) or
+something like Digital's Pathworks. Check your <tt class="filename">inetd.conf</tt> file before trying
+to start <span class="application">smbd</span> as a daemon, it can avoid a lot of frustration!
+</p><p>
+And yet another possible cause for failure of this test is when the subnet mask
+and / or broadcast address settings are incorrect. Please check that the
+network interface IP Address / Broadcast Address / Subnet Mask settings are
+correct and that Samba has correctly noted these in the <tt class="filename">log.nmbd</tt> file.
+</p></li><li><p>
+Run the command <b class="userinput"><tt>nmblookup -B BIGSERVER __SAMBA__</tt></b>. You should get the
+IP address of your Samba server back.
+</p><p>
+If you don't then nmbd is incorrectly installed. Check your <tt class="filename">inetd.conf</tt>
+if you run it from there, or that the daemon is running and listening
+to udp port 137.
+</p><p>
+One common problem is that many inetd implementations can't take many
+parameters on the command line. If this is the case then create a
+one-line script that contains the right parameters and run that from
+inetd.
+</p></li><li><p>run the command <b class="userinput"><tt>nmblookup -B ACLIENT '*'</tt></b></p><p>
+You should get the PCs IP address back. If you don't then the client
+software on the PC isn't installed correctly, or isn't started, or you
+got the name of the PC wrong.
+</p><p>
+If ACLIENT doesn't resolve via DNS then use the IP address of the
+client in the above test.
+</p></li><li><p>
+Run the command <b class="userinput"><tt>nmblookup -d 2 '*'</tt></b>
+</p><p>
+This time we are trying the same as the previous test but are trying
+it via a broadcast to the default broadcast address. A number of
+NetBIOS / TCP/IP hosts on the network should respond, although Samba may
+not catch all of the responses in the short time it listens. You
+should see <span class="errorname">got a positive name query response</span>
+messages from several hosts.
+</p><p>
+If this doesn't give a similar result to the previous test then
+nmblookup isn't correctly getting your broadcast address through its
+automatic mechanism. In this case you should experiment with the
+<a class="indexterm" name="id2958915"></a><i class="parameter"><tt>interfaces</tt></i> option in <tt class="filename">smb.conf</tt> to manually configure your IP
+address, broadcast and netmask.
+</p><p>
+If your PC and server aren't on the same subnet then you will need to
+use the <tt class="option">-B</tt> option to set the broadcast address to that of the PCs
+subnet.
+</p><p>
+This test will probably fail if your subnet mask and broadcast address are
+not correct. (Refer to TEST 3 notes above).
+</p></li><li><a class="indexterm" name="id2958962"></a><p>
+Run the command <b class="userinput"><tt>smbclient //BIGSERVER/TMP</tt></b>. You should
+then be prompted for a password. You should use the password of the account
+you are logged into the unix box with. If you want to test with
+another account then add the <tt class="option">-U <i class="replaceable"><tt>accountname</tt></i></tt> option to the end of
+the command line. eg:
+<b class="userinput"><tt>smbclient //bigserver/tmp -Ujohndoe</tt></b>
+</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>
+It is possible to specify the password along with the username
+as follows:
+<b class="userinput"><tt>smbclient //bigserver/tmp -Ujohndoe%secret</tt></b>
+</p></div><p>
+Once you enter the password you should get the <tt class="prompt">smb&gt;</tt> prompt. If you
+don't then look at the error message. If it says <span class="errorname">invalid network
+name</span> then the service <span class="emphasis"><em>&quot;tmp&quot;</em></span> is not correctly setup in your <tt class="filename">smb.conf</tt>.
+</p><p>
+If it says <span class="errorname">bad password</span> then the likely causes are:
+</p><div class="orderedlist"><ol type="1"><li><p>
+ you have shadow passwords (or some other password system) but didn't
+ compile in support for them in <span class="application">smbd</span>
+ </p></li><li><p>
+ your <a class="indexterm" name="id2959084"></a><i class="parameter"><tt>valid users</tt></i> configuration is incorrect
+ </p></li><li><p>
+ you have a mixed case password and you haven't enabled the <a class="indexterm" name="id2959107"></a><i class="parameter"><tt>password level</tt></i> option at a high enough level
+ </p></li><li><p>
+ the <a class="indexterm" name="id2959129"></a><i class="parameter"><tt>path</tt></i> line in <tt class="filename">smb.conf</tt> is incorrect. Check it with <span class="application">testparm</span>
+ </p></li><li><p>
+ you enabled password encryption but didn't map unix to samba users. Run </p><pre class="screen"><b class="userinput"><tt>smbpasswd -a <i class="replaceable"><tt>username</tt></i></tt></b></pre><p>.
+ </p></li></ol></div><p>
+Once connected you should be able to use the commands
+<b class="command">dir</b> <b class="command">get</b> <b class="command">put</b> etc.
+Type <b class="command">help <i class="replaceable"><tt>command</tt></i></b> for instructions. You should
+especially check that the amount of free disk space shown is correct
+when you type <b class="command">dir</b>.
+</p></li><li><p>
+On the PC, type the command <b class="userinput"><tt>net view \\BIGSERVER</tt></b>. You will
+need to do this from within a &quot;dos prompt&quot; window. You should get back a
+list of available shares on the server.
+</p><p>
+If you get a <span class="errorname">network name not found</span> or similar error then netbios
+name resolution is not working. This is usually caused by a problem in
+nmbd. To overcome it you could do one of the following (you only need
+to choose one of them):
+</p><div class="orderedlist"><ol type="1"><li><p>
+ fixup the <span class="application">nmbd</span> installation
+</p></li><li><p>
+ add the IP address of BIGSERVER to the <b class="command">wins server</b> box in the
+ advanced TCP/IP setup on the PC.
+</p></li><li><p>
+ enable windows name resolution via DNS in the advanced section of
+ the TCP/IP setup
+</p></li><li><p>
+ add BIGSERVER to your lmhosts file on the PC.
+</p></li></ol></div><p>
+If you get a <span class="errorname">invalid network name</span> or <span class="errorname">bad password error</span> then the
+same fixes apply as they did for the <b class="userinput"><tt>smbclient -L</tt></b> test above. In
+particular, make sure your <b class="command">hosts allow</b> line is correct (see the man
+pages)
+</p><p>
+Also, do not overlook that fact that when the workstation requests the
+connection to the samba server it will attempt to connect using the
+name with which you logged onto your Windows machine. You need to make
+sure that an account exists on your Samba server with that exact same
+name and password.
+</p><p>
+If you get <span class="errorname">specified computer is not receiving requests</span> or similar
+it probably means that the host is not contactable via tcp services.
+Check to see if the host is running tcp wrappers, and if so add an entry in
+the <tt class="filename">hosts.allow</tt> file for your client (or subnet, etc.)
+</p></li><li><p>
+Run the command <b class="userinput"><tt>net use x: \\BIGSERVER\TMP</tt></b>. You should
+be prompted for a password then you should get a <tt class="computeroutput">command completed
+successfully</tt> message. If not then your PC software is incorrectly
+installed or your smb.conf is incorrect. make sure your <b class="command">hosts allow</b>
+and other config lines in <tt class="filename">smb.conf</tt> are correct.
+</p><p>
+It's also possible that the server can't work out what user name to
+connect you as. To see if this is the problem add the line <a class="indexterm" name="id2959420"></a><i class="parameter"><tt>user</tt></i> = username to the <i class="parameter"><tt>[tmp]</tt></i> section of
+<tt class="filename">smb.conf</tt> where <i class="replaceable"><tt>username</tt></i> is the
+username corresponding to the password you typed. If you find this
+fixes things you may need the username mapping option.
+</p><p>
+It might also be the case that your client only sends encrypted passwords
+and you have <a class="indexterm" name="id2959460"></a><i class="parameter"><tt>encrypt passwords</tt></i> = no in <tt class="filename">smb.conf</tt>
+Turn it back on to fix.
+</p></li><li><p>
+Run the command <b class="userinput"><tt>nmblookup -M <i class="replaceable"><tt>testgroup</tt></i></tt></b> where
+<i class="replaceable"><tt>testgroup</tt></i> is the name of the workgroup that your Samba server and
+Windows PCs belong to. You should get back the IP address of the
+master browser for that workgroup.
+</p><p>
+If you don't then the election process has failed. Wait a minute to
+see if it is just being slow then try again. If it still fails after
+that then look at the browsing options you have set in <tt class="filename">smb.conf</tt>. Make
+sure you have <a class="indexterm" name="id2959524"></a><i class="parameter"><tt>preferred master</tt></i> = yes to ensure that
+an election is held at startup.
+</p></li><li><p>
+From file manager try to browse the server. Your samba server should
+appear in the browse list of your local workgroup (or the one you
+specified in <tt class="filename">smb.conf</tt>). You should be able to double click on the name
+of the server and get a list of shares. If you get a &quot;invalid
+password&quot; error when you do then you are probably running WinNT and it
+is refusing to browse a server that has no encrypted password
+capability and is in user level security mode. In this case either set
+<a class="indexterm" name="id2959575"></a><i class="parameter"><tt>security</tt></i> = server AND
+<a class="indexterm" name="id2959589"></a><i class="parameter"><tt>password server</tt></i> = Windows_NT_Machine in your
+<tt class="filename">smb.conf</tt> file, or make sure <a class="indexterm" name="id2959610"></a><i class="parameter"><tt>encrypt passwords</tt></i> is
+set to &quot;yes&quot;.
+</p></li></ol></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="troubleshooting.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="troubleshooting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="problems.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Part V. Troubleshooting </td><td width="20%" align="center"><a accesskey="h" href="samba-doc.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 34. Analysing and solving samba problems</td></tr></table></div></body></html>