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321 lines
5.9 KiB
HTML
321 lines
5.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Hosting a Microsoft Distributed File System tree on Samba</TITLE
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NAME="GENERATOR"
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TITLE="Optional configuration"
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TITLE="Configuring PAM for distributed but centrally
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managed authentication"
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>SAMBA Project Documentation</TH
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CLASS="CHAPTER"
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><H1
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><A
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NAME="MSDFS">Chapter 13. Hosting a Microsoft Distributed File System tree on Samba</H1
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="AEN1859">13.1. Instructions</H1
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><P
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>The Distributed File System (or Dfs) provides a means of
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separating the logical view of files and directories that users
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see from the actual physical locations of these resources on the
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network. It allows for higher availability, smoother storage expansion,
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load balancing etc. For more information about Dfs, refer to <A
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HREF="http://www.microsoft.com/NTServer/nts/downloads/winfeatures/NTSDistrFile/AdminGuide.asp"
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TARGET="_top"
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> Microsoft documentation</A
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>. </P
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><P
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>This document explains how to host a Dfs tree on a Unix
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machine (for Dfs-aware clients to browse) using Samba.</P
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><P
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>To enable SMB-based DFS for Samba, configure it with the
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<TT
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CLASS="PARAMETER"
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><I
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>--with-msdfs</I
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></TT
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> option. Once built, a
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Samba server can be made a Dfs server by setting the global
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boolean <A
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HREF="smb.conf.5.html#HOSTMSDFS"
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TARGET="_top"
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><TT
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CLASS="PARAMETER"
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><I
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> host msdfs</I
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></TT
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></A
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> parameter in the <TT
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CLASS="FILENAME"
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>smb.conf
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</TT
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> file. You designate a share as a Dfs root using the share
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level boolean <A
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HREF="smb.conf.5.html#MSDFSROOT"
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TARGET="_top"
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><TT
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CLASS="PARAMETER"
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><I
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> msdfs root</I
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></TT
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></A
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> parameter. A Dfs root directory on
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Samba hosts Dfs links in the form of symbolic links that point
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to other servers. For example, a symbolic link
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<TT
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CLASS="FILENAME"
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>junction->msdfs:storage1\share1</TT
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> in
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the share directory acts as the Dfs junction. When Dfs-aware
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clients attempt to access the junction link, they are redirected
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to the storage location (in this case, \\storage1\share1).</P
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><P
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>Dfs trees on Samba work with all Dfs-aware clients ranging
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from Windows 95 to 2000.</P
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><P
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>Here's an example of setting up a Dfs tree on a Samba
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server.</P
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><P
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><PRE
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CLASS="PROGRAMLISTING"
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># The smb.conf file:
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[global]
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netbios name = SAMBA
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host msdfs = yes
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[dfs]
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path = /export/dfsroot
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msdfs root = yes
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</PRE
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></P
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><P
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>In the /export/dfsroot directory we set up our dfs links to
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other servers on the network.</P
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><P
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><TT
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CLASS="PROMPT"
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>root# </TT
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><TT
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CLASS="USERINPUT"
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><B
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>cd /export/dfsroot</B
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></TT
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></P
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><P
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><TT
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CLASS="PROMPT"
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>root# </TT
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><TT
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CLASS="USERINPUT"
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><B
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>chown root /export/dfsroot</B
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></TT
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></P
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><P
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><TT
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CLASS="PROMPT"
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>root# </TT
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><TT
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CLASS="USERINPUT"
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><B
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>chmod 755 /export/dfsroot</B
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></TT
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></P
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><P
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><TT
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CLASS="PROMPT"
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>root# </TT
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><TT
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CLASS="USERINPUT"
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><B
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>ln -s msdfs:storageA\\shareA linka</B
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></TT
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></P
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><P
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><TT
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CLASS="PROMPT"
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>root# </TT
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><TT
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CLASS="USERINPUT"
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><B
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>ln -s msdfs:serverB\\share,serverC\\share linkb</B
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></TT
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></P
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><P
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>You should set up the permissions and ownership of
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the directory acting as the Dfs root such that only designated
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users can create, delete or modify the msdfs links. Also note
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that symlink names should be all lowercase. This limitation exists
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to have Samba avoid trying all the case combinations to get at
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the link name. Finally set up the symbolic links to point to the
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network shares you want, and start Samba.</P
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><P
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>Users on Dfs-aware clients can now browse the Dfs tree
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on the Samba server at \\samba\dfs. Accessing
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links linka or linkb (which appear as directories to the client)
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takes users directly to the appropriate shares on the network.</P
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN1894">13.1.1. Notes</H2
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><P
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></P
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><UL
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><LI
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><P
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>Windows clients need to be rebooted
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if a previously mounted non-dfs share is made a dfs
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root or vice versa. A better way is to introduce a
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new share and make it the dfs root.</P
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></LI
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><LI
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><P
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>Currently there's a restriction that msdfs
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symlink names should all be lowercase.</P
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></LI
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><LI
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><P
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>For security purposes, the directory
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acting as the root of the Dfs tree should have ownership
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and permissions set so that only designated users can
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modify the symbolic links in the directory.</P
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></LI
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></UL
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></DIV
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></DIV
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></DIV
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><DIV
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ALIGN="LEFT"
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WIDTH="34%"
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WIDTH="33%"
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ALIGN="left"
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>Configuring PAM for distributed but centrally
|
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managed authentication</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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