blog/Autodetecting_Client_setup_for_roaming_workstations_in_Debian_Edu.html

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  12  <h1>
  13      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  14
  15  </h1>
  16
  17 </div>
  18
  19
  20     <div class="entry">
  21       <div class="title">Autodetecting Client setup for roaming workstations in Debian Edu</div>
  22       <div class="date"> 7th August 2010</div>
  23       <div class="body"><p>A few days ago, I
  24 <a href="http://people.skolelinux.org/pere/blog/Debian_Edu_roaming_workstation___at_the_university_of_Oslo.html">tried
  25 to install</a> a Roaming workation profile from Debian Edu/Squeeze
  26 while on the university network here at the University of Oslo, and
  27 noticed how much had to change to get it operational using the
  28 university infrastructure.  It was fairly easy, but it occured to me
  29 that Debian Edu would improve a lot if I could get the client to
  30 connect without any changes at all, and thus let the client configure
  31 itself during installation and first boot to use the infrastructure
  32 around it.  Now I am a huge step further along that road.</p>
  33
  34 <p>With our current squeeze-test packages, I can select the roaming
  35 workstation profile and get a working laptop connecting to the
  36 university LDAP server for user and group and our active directory
  37 servers for Kerberos authentication.  All this without any
  38 configuration at all during installation.  My users home directory got
  39 a bookmark in the KDE menu to mount it via SMB, with the correct URL.
  40 In short, openldap and sssd is correctly configured.  In addition to
  41 this, the client look for http://wpad/wpad.dat to configure a web
  42 proxy, and when it fail to find it no proxy settings are stored in
  43 /etc/environment and /etc/apt/apt.conf.  Iceweasel and KDE is
  44 configured to look for the same wpad configuration and also do not use
  45 a proxy when at the university network.  If the machine is moved to a
  46 network with such wpad setup, it would automatically use it when DHCP
  47 gave it a IP address.</p>
  48
  49 <p>The LDAP server is located using DNS, by first looking for the DNS
  50 entry ldap.$domain.  If this do not exist, it look for the
  51 _ldap._tcp.$domain SRV records and use the first one as the LDAP
  52 server.  Next, it connects to the LDAP server and search all
  53 namingContexts entries for posixAccount or posixGroup objects, and
  54 pick the first one as the LDAP base.  For Kerberos, a similar
  55 algorithm is used to locate the LDAP server, and the realm is the
  56 uppercase version of $domain.</p>
  57
  58 <p>So, what is not working, you might ask.  SMB mounting my home
  59 directory do not work.  No idea why, but suspected the incorrect
  60 Kerberos settings in /etc/krb5.conf and /etc/samba/smb.conf might be
  61 the cause.  These are not properly configured during installation, and
  62 had to be hand-edited to get the correct Kerberos realm and server,
  63 but SMB mounting still do not work. :(</p>
  64
  65 <p>With this automatic configuration in place, I expect a Debian Edu
  66 roaming profile installation would be able to automatically detect and
  67 connect to any site using LDAP and Kerberos for NSS directory and PAM
  68 authentication.  It should also work out of the box in a Active
  69 Directory environment providing posixAccount and posixGroup objects
  70 with UID and GID values.</p>
  71
  72 <p>If you want to help out with implementing these things for Debian
  73 Edu, please contact us on debian-edu@lists.debian.org.</p>
  74 </div>
  75
  76       <div class="tags">Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>.</div>
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