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diff --git a/docs/Samba3-HOWTO/TOSHARG-AdvancedNetworkAdmin.xml b/docs/Samba3-HOWTO/TOSHARG-AdvancedNetworkAdmin.xml new file mode 100644 index 0000000000..66b4c27406 --- /dev/null +++ b/docs/Samba3-HOWTO/TOSHARG-AdvancedNetworkAdmin.xml @@ -0,0 +1,403 @@ +<?xml version="1.0" encoding="iso-8859-1"?> +<!DOCTYPE chapter PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc"> +<chapter id="AdvancedNetworkManagement"> +<chapterinfo> + &author.jht; + <pubdate>April 3 2003</pubdate> +</chapterinfo> + +<title>Advanced Network Management</title> + +<para> +This section documents peripheral issues that are of great importance to network +administrators who want to improve network resource access control, to automate the user +environment and to make their lives a little easier. +</para> + +<sect1> +<title>Features and Benefits</title> + +<para> +Often the difference between a working network environment and a well appreciated one can +best be measured by the <emphasis>little things</emphasis> that make everything work more +harmoniously. A key part of every network environment solution is the +ability to remotely +manage MS Windows workstations, remotely access the Samba server, provide customized +logon scripts, as well as other housekeeping activities that help to sustain more reliable +network operations. +</para> + +<para> +This chapter presents information on each of these areas. They are placed here, and not in +other chapters, for ease of reference. +</para> + +</sect1> + +<sect1> +<title>Remote Server Administration</title> + + +<para><quote>How do I get `User Manager' and `Server Manager'?</quote></para> + +<para> +<indexterm><primary>User Manager</primary></indexterm> +<indexterm><primary>Server Manager</primary></indexterm> +<indexterm><primary>Event Viewer</primary></indexterm> +Since I do not need to buy an <application>NT4 Server</application>, how do I get the `User Manager for Domains' +and the `Server Manager'? +</para> + +<para> +<indexterm><primary>Nexus.exe</primary></indexterm> +Microsoft distributes a version of these tools called <filename>Nexus.exe</filename> for installation +on <application>Windows 9x/Me</application> systems. The tools set includes: +</para> + +<itemizedlist> + <listitem><para>Server Manager</para></listitem> + <listitem><para>User Manager for Domains</para></listitem> + <listitem><para>Event Viewer</para></listitem> +</itemizedlist> + +<para> +Download the archived file at <ulink noescape="1" url="ftp://ftp.microsoft.com/Softlib/MSLFILES/NEXUS.EXE">ftp://ftp.microsoft.com/Softlib/MSLFILES/NEXUS.EXE.</ulink> +</para> + +<para> +<indexterm><primary>SRVTOOLS.EXE</primary></indexterm> +The <application>Windows NT 4.0</application> version of the `User Manager for +Domains' and `Server Manager' are available from Microsoft <ulink url="ftp://ftp.microsoft.com/Softlib/MSLFILES/SRVTOOLS.EXE">via ftp</ulink>. +</para> + +</sect1> + +<sect1> +<title>Remote Desktop Management</title> + +<para> +There are a number of possible remote desktop management solutions that range from free +through costly. Do not let that put you off. Sometimes the most costly solution is the +most cost effective. In any case, you will need to draw your own conclusions as to which +is the best tool in your network environment. +</para> + + <sect2> + <title>Remote Management from NoMachine.Com</title> + + <para> + <indexterm><primary>NoMachine.Com</primary></indexterm> + The following information was posted to the Samba mailing list at Apr 3 23:33:50 GMT 2003. + It is presented in slightly edited form (with author details omitted for privacy reasons). + The entire answer is reproduced below with some comments removed. + </para> + + <para><quote> + I have a wonderful Linux/Samba server running as pdc for a network. Now I would like to add remote + desktop capabilities so users outside could login to the system and get their desktop up from home or + another country. + </quote></para> + + <para><quote> + Is there a way to accomplish this? Do I need a Windows Terminal Server? Do I need to configure it so + it is a member of the domain or a BDC,PDC? Are there any hacks for MS Windows XP to enable remote login + even if the computer is in a domain? + </quote></para> + + <para> + Answer provided: Check out the new offer of <quote>NX</quote> software from + <ulink noescape="1" url="http://www.nomachine.com/">NoMachine</ulink>. + </para> + + <para> + It implements an easy-to-use interface to the Remote X protocol as + well as incorporating VNC/RFB and rdesktop/RDP into it, but at a speed + performance much better than anything you may have ever seen. + </para> + + <para> + Remote X is not new at all, but what they did achieve successfully is + a new way of compression and caching technologies that makes the thing + fast enough to run even over slow modem/ISDN connections. + </para> + + <para> + I could test drive their (public) Red Hat machine in Italy, over a loaded + Internet connection, with enabled thumbnail previews in KDE konqueror + which popped up immediately on <quote>mouse-over</quote>. From inside that (remote X) + session I started a rdesktop session on another, a Windows XP machine. + To test the performance, I played Pinball. I am proud to announce + that my score was 631750 points at first try. + </para> + + <para> + NX performs better on my local LAN than any of the other <quote>pure</quote> + connection methods I am using from time to time: TightVNC, rdesktop or + Remote X. It is even faster than a direct crosslink connection between + two nodes. + </para> + + <para> + I even got sound playing from the Remote X app to my local boxes, and + had a working <quote>copy'n'paste</quote> from an NX window (running a KDE session + in Italy) to my Mozilla mailing agent. These guys are certainly doing + something right! + </para> + + <para> + I recommend to test drive NX to anybody with a only a passing interest in remote computing + <ulink noescape="1" url="http://www.nomachine.com/testdrive.php">http://www.nomachine.com/testdrive.php</ulink>. + </para> + + <para> + Just download the free of charge client software (available for Red Hat, + SuSE, Debian and Windows) and be up and running within five minutes (they + need to send you your account data, though, because you are assigned + a real UNIX account on their testdrive.nomachine.com box. + </para> + + <para> + They plan to get to the point were you can have NX application servers + running as a cluster of nodes, and users simply start an NX session locally, + and can select applications to run transparently (apps may even run on + another NX node, but pretend to be on the same as used for initial login, + because it displays in the same window. You also can run it + full-screen, and after a short time you forget that it is a remote session + at all). + </para> + + <para> + Now the best thing for last: All the core compression and caching + technologies are released under the GPL and available as source code + to anybody who wants to build on it! These technologies are working, + albeit started from the command line only (and very inconvenient to + use in order to get a fully running remote X session up and running.) + </para> + + <para> + To answer your questions: + </para> + + <itemizedlist> + <listitem><para> + You do not need to install a terminal server; XP has RDP support built in. + </para></listitem> + + <listitem><para> + NX is much cheaper than Citrix &smbmdash; and comparable in performance, probably faster. + </para></listitem> + + <listitem><para> + You do not need to hack XP &smbmdash; it just works. + </para></listitem> + + <listitem><para> + You log into the XP box from remote transparently (and I think there is no + need to change anything to get a connection, even if authentication is against a domain). + </para></listitem> + + <listitem><para> + The NX core technologies are all Open Source and released under the GPL &smbmdash; + you can now use a (very inconvenient) command-line at no cost, + but you can buy a comfortable (proprietary) NX GUI front end for money. + </para></listitem> + + <listitem><para> + NoMachine are encouraging and offering help to OSS/Free Software implementations + for such a front end too, even if it means competition to them (they have written + to this effect even to the LTSP, KDE and GNOME developer mailing lists). + </para></listitem> + </itemizedlist> + + </sect2> + +</sect1> + +<sect1> +<title>Network Logon Script Magic</title> + +<para> +There are several opportunities for creating a custom network startup configuration environment. +</para> + +<itemizedlist> + <listitem><para>No Logon Script.</para></listitem> + <listitem><para>Simple universal Logon Script that applies to all users.</para></listitem> + <listitem><para>Use of a conditional Logon Script that applies per user or per group attributes.</para></listitem> + <listitem><para>Use of Samba's preexec and postexec functions on access to the NETLOGON share to create + a custom logon script and then execute it.</para></listitem> + <listitem><para>User of a tool such as KixStart.</para></listitem> +</itemizedlist> + +<para> +The Samba source code tree includes two logon script generation/execution tools. +See <filename>examples</filename> directory <filename>genlogon</filename> and +<filename>ntlogon</filename> subdirectories. +</para> + +<para> +The following listings are from the genlogon directory. +</para> + + +<para> +<indexterm><primary>genlogon.pl</primary></indexterm> +This is the <filename>genlogon.pl</filename> file: + +<smbfile name="genlogon.pl"> +<programlisting> + #!/usr/bin/perl + # + # genlogon.pl + # + # Perl script to generate user logon scripts on the fly, when users + # connect from a Windows client. This script should be called from + # smb.conf with the %U, %G and %L parameters. I.e: + # + # root preexec = genlogon.pl %U %G %L + # + # The script generated will perform + # the following: + # + # 1. Log the user connection to /var/log/samba/netlogon.log + # 2. Set the PC's time to the Linux server time (which is maintained + # daily to the National Institute of Standards Atomic clock on the + # internet. + # 3. Connect the user's home drive to H: (H for Home). + # 4. Connect common drives that everyone uses. + # 5. Connect group-specific drives for certain user groups. + # 6. Connect user-specific drives for certain users. + # 7. Connect network printers. + + # Log client connection + #($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(time); + ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(time); + open LOG, ">>/var/log/samba/netlogon.log"; + print LOG "$mon/$mday/$year $hour:$min:$sec"; + print LOG " - User $ARGV[0] logged into $ARGV[1]\n"; + close LOG; + + # Start generating logon script + open LOGON, ">/shared/netlogon/$ARGV[0].bat"; + print LOGON "\@ECHO OFF\r\n"; + + # Connect shares just use by Software Development group + if ($ARGV[1] eq "SOFTDEV" || $ARGV[0] eq "softdev") + { + print LOGON "NET USE M: \\\\$ARGV[2]\\SOURCE\r\n"; + } + + # Connect shares just use by Technical Support staff + if ($ARGV[1] eq "SUPPORT" || $ARGV[0] eq "support") + { + print LOGON "NET USE S: \\\\$ARGV[2]\\SUPPORT\r\n"; + } + + # Connect shares just used by Administration staff + If ($ARGV[1] eq "ADMIN" || $ARGV[0] eq "admin") + { + print LOGON "NET USE L: \\\\$ARGV[2]\\ADMIN\r\n"; + print LOGON "NET USE K: \\\\$ARGV[2]\\MKTING\r\n"; + } + + # Now connect Printers. We handle just two or three users a little + # differently, because they are the exceptions that have desktop + # printers on LPT1: - all other user's go to the LaserJet on the + # server. + if ($ARGV[0] eq 'jim' + || $ARGV[0] eq 'yvonne') + { + print LOGON "NET USE LPT2: \\\\$ARGV[2]\\LJET3\r\n"; + print LOGON "NET USE LPT3: \\\\$ARGV[2]\\FAXQ\r\n"; + } + else + { + print LOGON "NET USE LPT1: \\\\$ARGV[2]\\LJET3\r\n"; + print LOGON "NET USE LPT3: \\\\$ARGV[2]\\FAXQ\r\n"; + } + + # All done! Close the output file. + close LOGON; +</programlisting> +</smbfile> +</para> + +<para> +Those wishing to use more elaborate or capable logon processing system should check out these sites: +</para> + +<itemizedlist> + <listitem><para><ulink noescape="1" url="http://www.craigelachie.org/rhacer/ntlogon">http://www.craigelachie.org/rhacer/ntlogon</ulink></para></listitem> + <listitem><para><ulink noescape="1" url="http://www.kixtart.org">http://www.kixtart.org</ulink></para></listitem> +</itemizedlist> + +<sect2> +<title>Adding Printers without User Intervention</title> + + +<para> +<indexterm><primary>rundll32</primary></indexterm> +Printers may be added automatically during logon script processing through the use of: + +<screen> +&dosprompt;<userinput>rundll32 printui.dll,PrintUIEntry /?</userinput> +</screen> + +See the documentation in the <ulink url="http://support.microsoft.com/default.asp?scid=kb;en-us;189105">Microsoft knowledgebase article 189105.</ulink> +</para> +</sect2> + +<sect2> + <title>Limiting Logon Connections</title> + + <para> + Sometimes it is necessary to limit the number of concurrent connections to a + Samba shared resource. For example, a site may wish to permit only one network + logon per user. + </para> + + <para> + The Samba <parameter>preexec script</parameter> parameter can be used to permit only one + connection per user. Though this method is not fool-proof, and may have side-effects + the following contributed method may inspire someone to provide a better solution. + </para> + + <para> + This is not a perfect solution because Windows clients can drop idle connections + with an auto-reconnect capability that could result in the appearance that a share + is no longer in use, while actually it is. Even so, it demonstrates the principle + of use of the <parameter>preexec script</parameter> parameter. + </para> + + <para> + The following share configuration demonstrates use of the script shown in <link linkend="Tpees"/>: + <programlisting> +[myshare] + ... + preexec script = /sbin/PermitSingleLogon.sh + preexec close = Yes + ... + </programlisting> + </para> + +<example id="Tpees"> + <title>Script to Enforce Single Resource Logon</title> +<screen> +#!/bin/bash + +IFS="-" +RESULT=$(smbstatus -S -u $1 2> /dev/null | awk 'NF > 6 {print $1}' | sort | uniq -d) + +if [ "X${RESULT}" == X ]; then + exit 0 +else + exit 1 +fi +</screen> +</example> + +</sect2> + +</sect1> + +</chapter> |