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r149 r204 1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 1. NetBIOS in a Unix World</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.73.1"><link rel="start" href="index.html" title="SAMBA Developers Guide"><link rel="up" href="pt01.html" title="Part I. The protocol"><link rel="prev" href="pt01.html" title="Part I. The protocol"><link rel="next" href="ntdomain.html" title="Chapter 2. NT Domain RPC's"></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 1. NetBIOS in a Unix World</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="pt01.html">Prev</a> </td><th width="60%" align="center">Part I. The protocol</th><td width="20%" align="right"> <a accesskey="n" href="ntdomain.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="unix-smb"></a>Chapter 1. NetBIOS in a Unix World</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Andrew</span> <span class="surname">Tridgell</span></h3></div></div><div><p class="pubdate">April 1995</p></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="unix-smb.html#id249503 3">Introduction</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2495054">Usernames</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2495386">File Ownership</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2494713">Passwords</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2494750">Locking</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2494803">Deny Modes</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2494835">Trapdoor UIDs</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2542039">Port numbers</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2542084">Protocol Complexity</a></span></dt></dl></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2495033"></a>Introduction</h2></div></div></div><p>1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 1. NetBIOS in a Unix World</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.73.1"><link rel="start" href="index.html" title="SAMBA Developers Guide"><link rel="up" href="pt01.html" title="Part I. The protocol"><link rel="prev" href="pt01.html" title="Part I. The protocol"><link rel="next" href="ntdomain.html" title="Chapter 2. NT Domain RPC's"></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 1. NetBIOS in a Unix World</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="pt01.html">Prev</a> </td><th width="60%" align="center">Part I. The protocol</th><td width="20%" align="right"> <a accesskey="n" href="ntdomain.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="unix-smb"></a>Chapter 1. NetBIOS in a Unix World</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Andrew</span> <span class="surname">Tridgell</span></h3></div></div><div><p class="pubdate">April 1995</p></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="unix-smb.html#id2495034">Introduction</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2495055">Usernames</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2495387">File Ownership</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2494713">Passwords</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2494751">Locking</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2494803">Deny Modes</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2494835">Trapdoor UIDs</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2542043">Port numbers</a></span></dt><dt><span class="sect1"><a href="unix-smb.html#id2542089">Protocol Complexity</a></span></dt></dl></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2495034"></a>Introduction</h2></div></div></div><p> 2 2 This is a short document that describes some of the issues that 3 3 confront a SMB implementation on unix, and how Samba copes with … … 7 7 It was written to help out a person who was writing a paper on unix to 8 8 PC connectivity. 9 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id249505 4"></a>Usernames</h2></div></div></div><p>9 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2495055"></a>Usernames</h2></div></div></div><p> 10 10 The SMB protocol has only a loose username concept. Early SMB 11 11 protocols (such as CORE and COREPLUS) have no username concept at … … 44 44 validation and the derivation of the username from the service name 45 45 (either directly or via the user= option). 46 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id249538 6"></a>File Ownership</h2></div></div></div><p>46 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2495387"></a>File Ownership</h2></div></div></div><p> 47 47 The commonly used SMB protocols have no way of saying "you can't do 48 48 that because you don't own the file". They have, in fact, no concept … … 84 84 by the root user. See the documentation ENCRYPTION.txt for more 85 85 details. 86 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id249475 0"></a>Locking</h2></div></div></div><p>86 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2494751"></a>Locking</h2></div></div></div><p> 87 87 Since samba 2.2, samba supports other types of locking as well. This 88 88 section is outdated. … … 139 139 Note that you can also get the "trapdoor uid" message for other 140 140 reasons. Please see the FAQ for details. 141 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id25420 39"></a>Port numbers</h2></div></div></div><p>141 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2542043"></a>Port numbers</h2></div></div></div><p> 142 142 There is a convention that clients on sockets use high "unprivileged" 143 143 port numbers (>1000) and connect to servers on low "privilegedg" port … … 162 162 on. Interestingly WinNT3.1 got this right - it sends node status 163 163 responses back to the source port in the request. 164 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id254208 4"></a>Protocol Complexity</h2></div></div></div><p>164 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2542089"></a>Protocol Complexity</h2></div></div></div><p> 165 165 There are many "protocol levels" in the SMB protocol. It seems that 166 166 each time new functionality was added to a Microsoft operating system,
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