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+<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 6. Features</title><link rel="stylesheet" href="samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.59.1"><link rel="home" href="samba-faq.html" title="Samba FAQ"><link rel="up" href="samba-faq.html" title="Samba FAQ"><link rel="previous" href="FAQ-errors.html" title="Chapter 5. Common errors"><link rel="next" href="FAQ-Printing.html" title="Chapter 7. Printing 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 6. Features</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="FAQ-errors.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="FAQ-Printing.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><h2 class="title"><a name="FAQ-features"></a>Chapter 6. Features</h2></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><a href="FAQ-features.html#id2874269">How can I prevent my samba server from being used to distribute the Nimda worm?</a></dt><dt><a href="FAQ-features.html#id2874209">How can I use samba as a fax server?</a></dt><dd><dl><dt><a href="FAQ-features.html#id2874628">Tools for printing faxes</a></dt><dt><a href="FAQ-features.html#id2874681">Making the fax-server</a></dt><dt><a href="FAQ-features.html#id2874774">Installing the client drivers</a></dt><dt><a href="FAQ-features.html#id2874858">Example smb.conf</a></dt></dl></dd><dt><a href="FAQ-features.html#id2874883">Samba doesn't work well together with DHCP!</a></dt><dt><a href="FAQ-features.html#id2874531">How can I assign NetBIOS names to clients with DHCP?</a></dt><dt><a href="FAQ-features.html#id2874581">How do I convert between unix and dos text formats?</a></dt><dt><a href="FAQ-features.html#id2874612">Does samba have wins replication support?</a></dt></dl></div><div class="sect1" lang="en"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="id2874269"></a>How can I prevent my samba server from being used to distribute the Nimda worm?</h2></div></div><p>Author: HASEGAWA Yosuke (translated by <a href="monyo@samba.gr.jp" target="_top">TAKAHASHI Motonobu</a>)</p><p>
+Nimba Worm is infected through shared disks on a network, as well as through
+Microsoft IIS, Internet Explorer and mailer of Outlook series.
+</p><p>
+At this time, the worm copies itself by the name *.nws and *.eml on
+the shared disk, moreover, by the name of Riched20.dll in the folder
+where *.doc file is included.
+</p><p>
+To prevent infection through the shared disk offered by Samba, set
+up as follows:
+</p><p>
+</p><pre class="programlisting">
+[global]
+ ...
+ # This can break Administration installations of Office2k.
+ # in that case, don't veto the riched20.dll
+ veto files = /*.eml/*.nws/riched20.dll/
+</pre><p>
+</p><p>
+By setting the &quot;veto files&quot; parameter, matched files on the Samba
+server are completely hidden from the clients and making it impossible
+to access them at all.
+</p><p>
+In addition to it, the following setting is also pointed out by the
+samba-jp:09448 thread: when the
+&quot;readme.txt.{3050F4D8-98B5-11CF-BB82-00AA00BDCE0B}&quot; file exists on
+a Samba server, it is visible only as &quot;readme.txt&quot; and dangerous
+code may be executed if this file is double-clicked.
+</p><p>
+Setting the following,
+</p><pre class="programlisting">
+ veto files = /*.{*}/
+</pre><p>
+any files having CLSID in its file extension will be inaccessible from any
+clients.
+</p><p>
+This technical article is created based on the discussion of
+samba-jp:09448 and samba-jp:10900 threads.
+</p></div><div class="sect1" lang="en"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="id2874209"></a>How can I use samba as a fax server?</h2></div></div><p>Contributor: <a href="mailto:zuber@berlin.snafu.de" target="_top">Gerhard Zuber</a></p><p>Requirements:
+</p><table class="simplelist" border="0" summary="Simple list"><tr><td>UNIX box (Linux preferred) with SAMBA and a faxmodem</td></tr><tr><td>ghostscript package</td></tr><tr><td>mgetty+sendfax package</td></tr><tr><td>pbm package (portable bitmap tools)</td></tr></table><p>
+</p><p>First, install and configure the required packages. Be sure to read the mgetty+sendfax
+manual carefully.</p><div class="sect2" lang="en"><div class="titlepage"><div><h3 class="title"><a name="id2874628"></a>Tools for printing faxes</h3></div></div><p>Your incomed faxes are in:
+<tt>/var/spool/fax/incoming</tt>. Print it with:</p><pre class="programlisting">
+for i in *
+do
+g3cat $i | g3tolj | lpr -P hp
+done
+</pre><p>
+</p><p>
+g3cat is in the tools-section, g3tolj is in the contrib-section
+for printing to HP lasers.
+</p><p>
+If you want to produce files for displaying and printing with Windows, use
+some tools from the pbm-package like the following command: <b>g3cat $i | g3topbm - | ppmtopcx - &gt;$i.pcx</b>
+and view it with your favourite Windows tool (maybe paintbrush)
+</p></div><div class="sect2" lang="en"><div class="titlepage"><div><h3 class="title"><a name="id2874681"></a>Making the fax-server</h3></div></div><p>fetch the file <tt>mgetty+sendfax/frontends/winword/faxfilter</tt> and place it in <tt>/usr/local/etc/mgetty+sendfax/</tt>(replace /usr/local/ with whatever place you installed mgetty+sendfax)</p><p>prepare your faxspool file as mentioned in this file
+edit fax/faxspool.in and reinstall or change the final
+/usr/local/bin/faxspool too.
+</p><pre class="programlisting">
+if [ &quot;$user&quot; = &quot;root&quot; -o &quot;$user&quot; = &quot;fax&quot; -o \
+ &quot;$user&quot; = &quot;lp&quot; -o &quot;$user&quot; = &quot;daemon&quot; -o &quot;$user&quot; = &quot;bin&quot; ]
+</pre><p>find the first line and change it to the second.</p><p>
+make sure you have pbmtext (from the pbm-package). This is
+needed for creating the small header line on each page.
+</p><p>Prepare your faxheader <tt>/usr/local/etc/mgetty+sendfax/faxheader</tt></p><p>
+Edit your /etc/printcap file:
+</p><pre class="programlisting">
+# FAX
+lp3|fax:\
+ :lp=/dev/null:\
+ :sd=/usr/spool/lp3:\
+ :if=/usr/local/etc/mgetty+sendfax/faxfilter:sh:sf:mx#0:\
+ :lf=/usr/spool/lp3/fax-log:
+</pre><p>Now, edit your <tt>smb.conf</tt> so you have a smb based printer named &quot;fax&quot;</p></div><div class="sect2" lang="en"><div class="titlepage"><div><h3 class="title"><a name="id2874774"></a>Installing the client drivers</h3></div></div><p>
+Now you have a printer called &quot;fax&quot; which can be used via
+TCP/IP-printing (lpd-system) or via SAMBA (windows printing).
+</p><p>
+On every system you are able to produce postscript-files you
+are ready to fax.
+</p><p>
+On Windows 3.1 95 and NT:
+</p><p>
+Install a printer wich produces postscript output,
+ e.g. apple laserwriter
+</p><p>Connect the &quot;fax&quot; to your printer.</p><p>
+Now write your first fax. Use your favourite wordprocessor,
+write, winword, notepad or whatever you want, and start
+with the headerpage.
+</p><p>
+Usually each fax has a header page. It carries your name,
+your address, your phone/fax-number.
+</p><p>
+It carries also the recipient, his address and his *** fax
+number ***. Now here is the trick:
+</p><p>
+Use the text:
+</p><pre class="programlisting">
+Fax-Nr: 123456789
+</pre><p>
+as the recipients fax-number. Make sure this text does not
+occur in regular text ! Make sure this text is not broken
+by formatting information, e.g. format it as a single entity.
+(Windows Write and Win95 Wordpad are functional, maybe newer
+ versions of Winword are breaking formatting information).
+</p><p>
+The trick is that postscript output is human readable and
+the faxfilter program scans the text for this pattern and
+uses the found number as the fax-destination-number.
+</p><p>
+Now print your fax through the fax-printer and it will be
+queued for later transmission. Use faxrunq for sending the
+queue out.
+</p></div><div class="sect2" lang="en"><div class="titlepage"><div><h3 class="title"><a name="id2874858"></a>Example smb.conf</h3></div></div><pre class="programlisting">
+[global]
+ printcap name = /etc/printcap
+ print command = /usr/bin/lpr -r -P %p %s
+ lpq command = /usr/bin/lpq -P %p
+ lprm command = /usr/bin/lprm -P %p %j
+
+[fax]
+ comment = FAX (mgetty+sendfax)
+ path = /tmp
+ printable = yes
+ public = yes
+ writable = no
+ create mode = 0700
+ browseable = yes
+ guest ok = no
+</pre></div></div><div class="sect1" lang="en"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="id2874883"></a>Samba doesn't work well together with DHCP!</h2></div></div><p>
+We wish to help those folks who wish to use the ISC DHCP Server and provide
+sample configuration settings. Most operating systems today come ship with
+the ISC DHCP Server. ISC DHCP is available from:
+<a href="ftp://ftp.isc.org/isc/dhcp" target="_top">ftp://ftp.isc.org/isc/dhcp</a>
+</p><p>
+Incorrect configuration of MS Windows clients (Windows9X, Windows ME, Windows
+NT/2000) will lead to problems with browsing and with general network
+operation. Windows 9X/ME users often report problems where the TCP/IP and related
+network settings will inadvertantly become reset at machine start-up resulting
+in loss of configuration settings. This results in increased maintenance
+overheads as well as serious user frustration.
+</p><p>
+In recent times users on one mailing list incorrectly attributed the cause of
+network operating problems to incorrect configuration of Samba.
+</p><p>
+One user insisted that the only way to provent Windows95 from periodically
+performing a full system reset and hardware detection process on start-up was
+to install the NetBEUI protocol in addition to TCP/IP. This assertion is not
+correct.
+</p><p>
+In the first place, there is NO need for NetBEUI. All Microsoft Windows clients
+natively run NetBIOS over TCP/IP, and that is the only protocol that is
+recognised by Samba. Installation of NetBEUI and/or NetBIOS over IPX will
+cause problems with browse list operation on most networks. Even Windows NT
+networks experience these problems when incorrectly configured Windows95
+systems share the same name space. It is important that only those protocols
+that are strictly needed for site specific reasons should EVER be installed.
+</p><p>
+Secondly, and totally against common opinion, DHCP is NOT an evil design but is
+an extension of the BOOTP protocol that has been in use in Unix environments
+for many years without any of the melt-down problems that some sensationalists
+would have us believe can be experienced with DHCP. In fact, DHCP in covered by
+rfc1541 and is a very safe method of keeping an MS Windows desktop environment
+under control and for ensuring stable network operation.
+</p><p>
+Please note that MS Windows systems as of MS Windows NT 3.1 and MS Windows 95
+store all network configuration settings a registry. There are a few reports
+from MS Windows network administrators that warrant mention here. It would appear
+that when one sets certain MS TCP/IP protocol settings (either directly or via
+DHCP) that these do get written to the registry. Even though a subsequent
+change of setting may occur the old value may persist in the registry. This
+has been known to create serious networking problems.
+</p><p>
+An example of this occurs when a manual TCP/IP environment is configured to
+include a NetBIOS Scope. In this event, when the administrator then changes the
+configuration of the MS TCP/IP protocol stack, without first deleting the
+current settings, by simply checking the box to configure the MS TCP/IP stack
+via DHCP then the NetBIOS Scope that is still persistent in the registry WILL be
+applied to the resulting DHCP offered settings UNLESS the DHCP server also sets
+a NetBIOS Scope. It may therefore be prudent to forcibly apply a NULL NetBIOS
+Scope from your DHCP server. The can be done in the dhcpd.conf file with the
+parameter:
+<b>option netbios-scope &quot;&quot;;</b>
+</p><p>
+While it is true that the Microsoft DHCP server that comes with Windows NT
+Server provides only a sub-set of rfc1533 functionality this is hardly an issue
+in those sites that already have a large investment and commitment to Unix
+systems and technologies. The current state of the art of the DHCP Server
+specification in covered in rfc2132.
+</p></div><div class="sect1" lang="en"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="id2874531"></a>How can I assign NetBIOS names to clients with DHCP?</h2></div></div><p>
+SMB network clients need to be configured so that all standard TCP/IP name to
+address resolution works correctly. Once this has been achieved the SMB
+environment provides additional tools and services that act as helper agents in
+the translation of SMB (NetBIOS) names to their appropriate IP Addresses. One
+such helper agent is the NetBIOS Name Server (NBNS) or as Microsoft called it
+in their Windows NT Server implementation WINS (Windows Internet Name Server).
+</p><p>
+A client needs to be configured so that it has a unique Machine (Computer)
+Name.
+</p><p>
+This can be done, but needs a few NT registry hacks and you need to be able to
+speak UNICODE, which is of course no problem for a True Wizzard(tm) :)
+Instructions on how to do this (including a small util for less capable
+Wizzards) can be found at
+</p><p><a href="http://www.unixtools.org/~nneul/sw/nt/dhcp-netbios-hostname.html" target="_top">http://www.unixtools.org/~nneul/sw/nt/dhcp-netbios-hostname.html</a></p></div><div class="sect1" lang="en"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="id2874581"></a>How do I convert between unix and dos text formats?</h2></div></div><p>
+Jim barry has written an <a href="ftp://samba.org/pub/samba/contributed/fixcrlf.zip" target="_top">
+excellent drag-and-drop cr/lf converter for
+windows</a>. Just drag your file onto the icon and it converts the file.
+</p><p>
+The utilities unix2dos and dos2unix(in the mtools package) should do
+the job under unix.
+</p></div><div class="sect1" lang="en"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="id2874612"></a>Does samba have wins replication support?</h2></div></div><p>
+At the time of writing there is currently being worked on a wins replication implementation(wrepld).
+</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="FAQ-errors.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="samba-faq.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="FAQ-Printing.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 5. Common errors </td><td width="20%" align="center"><a accesskey="h" href="samba-faq.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 7. Printing problems</td></tr></table></div></body></html>