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<TD style="PADDING-LEFT: 10px; PADDING-TOP: 10px" width=488><A
href="http://act.it.sohu.com/book/index.php">連載</A> > <A
href="http://act.it.sohu.com/book/slist.php?class1=8">網(wǎng)絡(luò)應(yīng)用</A> > <A
href="http://act.it.sohu.com/book/slist.php?class2=55">網(wǎng)絡(luò)安全</A> > <A
href="http://act.it.sohu.com/book/serialize.php?id=629">反彈型木馬原理</A> </TD>
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<DIV style="FONT-SIZE: 18pt; COLOR: #990000; FONT-FAMILY: 楷體_GB2312"
align=center><B>反彈型木馬防范篇</B></DIV><BR>
<DIV style="FONT-SIZE: 18px; COLOR: #990000; FONT-FAMILY: ; 宋體: "
align=center>一、關(guān)閉不用的端口</DIV>
<DIV
style="PADDING-RIGHT: 10px; PADDING-LEFT: 10px; FONT-SIZE: 10.5pt; COLOR: black; LINE-HEIGHT: 180%"
align=left><BR> <STRONG>一、關(guān)閉不用的端口</STRONG>
<P> 默認(rèn)情況下Windows有很多端口是開放的，在你上網(wǎng)的時候，網(wǎng)絡(luò)病毒和黑客可以通過這些端口連上你的電腦，為了讓你的系統(tǒng)銅墻鐵壁，應(yīng)該封閉這些端口，主要有：TCP
139、445、593、1025 端口和 UDP123、137、138、445、1900 端口，一些流行病毒的后門端口（如 TCP
2513、2745、3127、6129 端口），以及遠程服務(wù)訪問端口3389。</P>
<P> 137、138、139、445端口都是為共享而開的，是NetBios協(xié)議的應(yīng)用，你應(yīng)該禁止別人共享你的機器，所以要把這些端口全部關(guān)閉，方法是：單擊“開始”/控制面板/系統(tǒng)/硬件/設(shè)備管理器，單擊“查看”菜單下的“顯示隱藏的設(shè)備”，單擊“非即插即用驅(qū)動程序”，找到Netbios
over Tcpip禁用該設(shè)備，重新啟動后即可。</P>
<P> 關(guān)閉UDP123端口：單擊“開始”/設(shè)置/控制面板，雙擊“管理工具”/服務(wù)，停止windows time服務(wù)即可，關(guān)閉UDP
123端口，可以防范某些<FONT color=blue size=2>蠕蟲</FONT>病毒。</P>
<P> 關(guān)閉UDP1900端口：在控制面板中雙擊“管理工具”/服務(wù)，停止SSDP Discovery Service
服務(wù)即可。關(guān)閉這個端口，可以防范DDoS攻擊。<BR><BR> 其他端口你可以用網(wǎng)絡(luò)防火墻關(guān)閉之，或者在控制面板中，雙擊“管理工具”/本地安全策略，選中“IP
安全策略，在本地計算機”，創(chuàng)建 IP 安全策略來關(guān)閉這些端口。</P><BR><BR></DIV></TD></TR>
<TR>
<TD class=center01>
<DIV align=center>來源：天極網(wǎng) 作者：
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