📄 1089.html

📁 著名的linux英雄站点的文档打包
💻 HTML
📖 第 1 页 / 共 3 页
字号:
12 3 下一页
<HTML><HEAD><TITLE>
linux知识宝库/网络安全/用LIDS增强Linux系统安全</TITLE>
<META http-equiv=content-type content="text/html; charset=gb2312">
<META content=linuxtips,linux,php,mysql,apache name=keywords>
<STYLE type=text/css>A:link {
	COLOR: #666666; TEXT-DECORATION: underline
}
A:active {
	COLOR: #666666; TEXT-DECORATION: underline
}
A:visited {
	COLOR: #666666; TEXT-DECORATION: underline
}
A:hover {
	COLOR: #708090; TEXT-DECORATION: none
}
.articletitle {
	FONT-WEIGHT: bold; FONT-SIZE: 18px; COLOR: #335588; LINE-HEIGHT: 26px; FONT-FAMILY: trebuchet ms, arial, verdana, helvetica, sans-serif; TEXT-DECORATION: none
}
INPUT {
	FONT-WEIGHT: normal; FONT-SIZE: 11px; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
TEXTAREA {
	FONT-WEIGHT: normal; FONT-SIZE: 11px; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
.bginput {
	BORDER-RIGHT: #999999 1px solid; BORDER-TOP: #999999 1px solid; FONT-SIZE: 8pt; BORDER-LEFT: #999999 1px solid; BORDER-BOTTOM: #999999 1px solid; FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif; BACKGROUND-COLOR: #f9f9f9
}
.text {
	BORDER-RIGHT: #cccccc 1px solid; BORDER-TOP: #666666 1px solid; BORDER-LEFT: #666666 1px solid; BORDER-BOTTOM: #cccccc 1px solid
}
SELECT {
	FONT-WEIGHT: normal; FONT-SIZE: 12px; COLOR: #000000; FONT-FAMILY: 宋体; BACKGROUND-COLOR: #ffffff
}
.firstalt {
	BACKGROUND-COLOR: #eeeeee
}
.secondalt {
	BACKGROUND-COLOR: #ffffff
}
.bigfont {
	FONT-SIZE: 45px; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
.normalfont {
	FONT-SIZE: 12px; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
.middlefont {
	FONT-SIZE: 11px; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
.smallfont {
	FONT-SIZE: 9px; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
.smallbold {
	FONT-WEIGHT: bold; COLOR: #000000
}
.articletitle {
	FONT-WEIGHT: bold; FONT-SIZE: 18px; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
.subhead {
	FONT-WEIGHT: bold; FONT-SIZE: 13px; COLOR: #006699; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
#content A:link {
	COLOR: #3366cc; TEXT-DECORATION: underline
}
#content A:active {
	COLOR: #3366cc; TEXT-DECORATION: underline
}
#content A:visited {
	COLOR: #3366cc; TEXT-DECORATION: underline
}
#content A:hover {
	COLOR: #9966cc; TEXT-DECORATION: none
}
.content {
	FONT-SIZE: 14px; LINE-HEIGHT: 130%; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
.titlefont {
	FONT-SIZE: 12px; COLOR: #ffffff; FONT-FAMILY: verdana, arial, helvetica, sans-serif,宋体
}
.bodyline {
	BORDER-RIGHT: #aebdc4 1px solid; BORDER-TOP: #aebdc4 1px solid; BORDER-LEFT: #aebdc4 1px solid; BORDER-BOTTOM: #aebdc4 1px solid; BACKGROUND-COLOR: #ffffff
}
.cattitle {
	FONT-WEIGHT: bold; FONT-SIZE: 12px; COLOR: #000000; LETTER-SPACING: 1px
}
.tableoutline {
	BORDER-RIGHT: #c4c4c4 1px solid; BORDER-TOP: #c4c4c4 1px solid; BORDER-LEFT: #c4c4c4 1px solid; BORDER-BOTTOM: #c4c4c4 1px solid
}
.root_td {
	PADDING-LEFT: 5px; FONT-WEIGHT: bold; FONT-SIZE: 12px; FONT-FAMILY: Verdana; HEIGHT: 22px; BACKGROUND-COLOR: #ffffff; font-color: #000000
}
.child_td {
	PADDING-RIGHT: 10px; PADDING-LEFT: 10px; FONT-SIZE: 12px; PADDING-BOTTOM: 3px; COLOR: #000000; FONT-FAMILY: Verdana; HEIGHT: 22px; BACKGROUND-COLOR: #f5f5f5; TEXT-DECORATION: underline
}
#cattitle A:link {
	COLOR: #000000; TEXT-DECORATION: none
}
#cattitle A:visited {
	COLOR: #000000; TEXT-DECORATION: none
}
#cattitle A:active {
	COLOR: #000000; TEXT-DECORATION: none
}
#cattitle A:hover {
	COLOR: #000000; TEXT-DECORATION: none
}
</STYLE>

<SCRIPT language=JavaScript type=text/javascript>
<!--
if (parent.frames.length > 0) {
    parent.location.href = self.document.location
}
function ToggleNode(nodeObject, imgObject){
             if(nodeObject.style.display == '' || nodeObject.style.display == 'inline'){
               nodeObject.style.display = 'none';
               imgObject.src = 'images/plus.gif'/*tpa=http://www.linuxhero.com/docs/images/plus.gif*/;
             }else{
               nodeObject.style.display = 'inline';
               imgObject.src = 'images/minus.gif'/*tpa=http://www.linuxhero.com/docs/images/minus.gif*/;
            }
}
-->
</SCRIPT>

<BODY text=#000000 bgColor=#ffffff leftMargin=0 topMargin=0 marginwidth="0" 
marginheight="0">
<CENTER>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
  <TR>
    <TD vAlign=top>
      <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
        <TBODY>
        <TR>
          <TD><IMG height=1 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=296 
          border=0></TD>
          <TD><IMG height=1 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=76 
border=0></TD>
          <TD><IMG height=1 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=100 
          border=0></TD>
          <TD><IMG height=1 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=98 
border=0></TD>
          <TD><IMG height=1 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=79 
border=0></TD>
          <TD><IMG height=1 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=103 
          border=0></TD>
          <TD><IMG height=1 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=26 
border=0></TD>
          <TD><IMG height=1 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=1 
        border=0></TD></TR>
        <TR>
          <TD colSpan=3><A title=linux知识宝库 
            href="index.html" tppabs="http://www.linuxhero.com/docs/index.html"><IMG height=83 
            src="images/header_r1_c1.gif" tppabs="http://www.linuxhero.com/docs/images/header_r1_c1.gif" width=472 border=0 
            name=header_r1_c1></A></TD>
            <TD colSpan=3>
              <form action="http://www.linuxhero.com/docs/search.html" method=get>
                <table 
                        style="BORDER-RIGHT: #c4c4c4 1px solid; BORDER-TOP: #c4c4c4 1px solid; BORDER-LEFT: #c4c4c4 1px solid; BORDER-BOTTOM: #c4c4c4 1px solid" 
                        cellspacing=0 cellpadding=3 width="95%" border=0 align="center">
                  <tbody> 
                  <tr> 
                    <td noWrap background="images/bgline.gif" tppabs="http://www.linuxhero.com/docs/images/bgline.gif"> 
                      <div align=center><font class=normalfont>搜索文章: 
                        <input type=hidden value=result name=action2>
                          <input type=radio checked value=title name=type>标题 
                          <input type=radio value=content name=type>内容 
                          <input type=image src="images/button_go.gif" tppabs="http://www.linuxhero.com/docs/images/button_go.gif" border=0 name=image2>
                        </font></div>
                    </td>
                  </tr>
                  <tr> 
                    <td noWrap> 
                      <div align="center"> 
                        <input maxlength=100 size=30 name=keyword2>
                      </div>
                    </td>
                  </tr></tbody> 
                </table>
              </form>
            </TD>
            <TD rowSpan=2><IMG src="images/header_r1_c7.gif" tppabs="http://www.linuxhero.com/docs/images/header_r1_c7.gif" width=26 border=0 name=header_r1_c7></TD>
          <TD><IMG height=83 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=1 border=0></TD></TR>
        <TR>
          <TD background="images/bgline.gif" tppabs="http://www.linuxhero.com/docs/images/bgline.gif"><IMG height=22 
            src="images/header_r2_c1.gif" tppabs="http://www.linuxhero.com/docs/images/header_r2_c1.gif" width=296 border=0 
            name=header_r2_c1></TD>
          <TD background="images/bgline.gif" tppabs="http://www.linuxhero.com/docs/images/bgline.gif" colSpan=5>
              <DIV align=right><FONT class=normalfont>当前位置： 
              <A href="index.html" tppabs="http://www.linuxhero.com/docs/index.html">本站首页</A>
              <font color="#FF6699">&gt;&gt;</font>
<A href="type15.html" tppabs="http://www.linuxhero.com/docs/type15.html">网络安全</A>                 | <A href="copyright.html" tppabs="http://www.linuxhero.com/docs/copyright.html">版权说明</A></font></DIV>
            </TD>
          <TD><IMG height=22 src="images/spacer.gif" tppabs="http://www.linuxhero.com/docs/images/spacer.gif" width=1 
        border=0></TD></TR></TBODY></TABLE>
      <TABLE cellSpacing=10 cellPadding=0 width="100%" bgColor=#ffffff 
        border=0>
         <TR>
          <TD>
            <TABLE cellSpacing=0 cellPadding=3 width="100%" border=0>
              
              <TR>
                <TD vAlign=top align=middle width="60%">
                  <TABLE cellSpacing=0 cellPadding=0 width="100%" 
                  background="images/back.gif" tppabs="http://www.linuxhero.com/docs/images/back.gif" border=0>
                    <TBODY>
                    <TR>
                        <TD vAlign=top width="80%"> 
                          <DIV align=center>
                        <FORM action="search.html" tppabs="http://www.linuxhero.com/docs/search.html" method=get>
                            </FORM>
                        <TABLE cellSpacing=0 cellPadding=0 width="95%" 
                          border=0><TBODY>
                          <TR>
                            <TD background="images/bgi.gif" tppabs="http://www.linuxhero.com/docs/images/bgi.gif" 
                          height=30></TD></TR></TBODY></TABLE>
                        <TABLE cellSpacing=0 cellPadding=3 width="95%" 
                        align=center border=0>
                          <TBODY>
                          <TR>
                            <TD>
                              <TABLE cellSpacing=0 cellPadding=3 width="100%" 
                              border=0>
                                <TBODY>
                                <TR>
                                      <TD vAlign=top> 
<p><FONT class=normalfont><B><font color=blue>用LIDS增强Linux系统安全</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：作者<br>来自：Linux知识宝库<br>联系方式：无名<br><br>LIDS( Linux入侵侦察系统)是Linux内核补丁和系统管理员工具(lidsadm)，它加强了Linus内核。 它在内核中实现了一种安全模式 -- 参考模式以及内核中的Mandatory Access Contro l（命令进入控制）模式。本文将阐述LIDS的功能和如何使用它来建立一个安全的Linux系统。<br>
<br>
1. 为什么选择LIDS<br>
<br>
　　随着互连网上Linux越来越受欢迎 ,越来越多现有GNU/LINUX系统上的应用软件中的安全漏洞被发现。很多程序利用了程序员的粗心，例如缓存溢出、格式化代码攻击。当系统安全受到程序的危及，黑客获得ROOT权限以后，整个系统将被入侵者控制。<br>
<br>
　　由于代码的开放性，我们可以获得很多所希望Linux应用程序的原代码，并且根据我们的需要来修改。所以bug能很容易地被找到，并很快修补。但是当漏洞被揭示后，而系统管理员疏于给漏洞打补丁，从而造成很容易地就被入侵，更糟的是黑客能获得ROOT SHELL。利用现有的GNU/Linux系统，他为所欲为。这正是LIDS想要解决的问题。<br>
<br>
　　首先看看现有的GNU/Linux系统存在哪些问题。<br>
<br>
　　文件系统未受到保护<br>
<br>
　　系统中的很多重要的文件，例如 /bin/login，一旦黑客入侵后，他可以上传修改过的l<br>
ogin文件来代替/bin/login ，然后他就可以不需要任何登陆名和密码就登陆系统。这常被称<br>
为Trojan house。<br>
<br>
　　进程未受到保护<br>
<br>
　　系统上运行的进程是为某些系统功能所服务的，例如HTTPD是一个web服务器来满足远程客户端对于web的需求。作为web服务器系统，保护其进程不被非法终止是很重要的。但是当入侵者获得了ROOT权限后，我们却无能为力。<br>
<br>
　　系统管理未受保护<br>
<br>
12 3 下一页
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -