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<p><FONT class=normalfont><B><font color=blue>邮件防毒</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>邮件防毒<br>
<br>
linux 上的邮件网关（杀病毒）AntiVir MailGate ， 它有两种方法：<br>
<br>
1. 直接作 mail 网关，然后利用“ 管道 ”调用 smtp 程序。支持标准的 smtp 程序： sendmail、postfix、qmail。<br>
<br>
2. 也是作 mail 网关，在 /etc/sendmail.cf 里添加 avgatemail 选项 （这样 sendmail 在 825 端口监听），然后 再利用 825 端口转发邮件。意思是：25 即是 avmailgate 的 smtp 端口，然后它再利用 825（sendmail）端口转发邮件 ！<br>
请注意：但是人家还是可以利用你的 825 端口 （就是利用原来的 senmail 来给你发送病毒邮件！但是，这种情况很少的。）。这时你可以用防火墙来阻止来自外部的对本机的 825 端口的连接。<br>
<br>
<br>
在 /etc/services 里面增加：<br>
smtp-backdoor 825/tcp<br>
<br>
修改 sendmail.cf 成：<br>
# SMTP daemon options<br>
<br>
#O DaemonPortOptions=Port=smtp,Addr=127.0.0.1, Name=MTA<br>
# 原来的。<br>
<br>
# -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- gugong -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-<br>
#<br>
# 红帽子 V7.x V8.0 所建立的本文件默认 “只” 对 localhost 即 127.0.0.1<br>
# 提供服务,根据以往本文件的内容，修改为：<br>
#<br>
# SMTP daemon options<br>
O DaemonPortOptions=Name=MTA, Port=smtp-backdoor<br>
<br>
O DaemonPortOptions=Port=587, Name=MSA, M=E<br>
<br>
# 若 不需要 avgatemail ，则应该是：<br>
#O DaemonPortOptions=Name=MTA<br>
<br>
#O DaemonPortOptions=Port=587, Name=MSA, M=E<br>
# 在端口 587 提供 submission 服务（MSA）。<br>
# -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- gugong -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-<br>
<br>
<br>
请看：<br>
邮件网关杀除病毒后返回的报告：<br>
<br>
一、<br>
<br>
*********************************************************************<br>
AntiVir Virus Alert<br>
*********************************************************************<br>
This version of AntiVir MailGate is licensed for private and non-commercial use.<br>
*********************************************************************<br>
<br>
AntiVir found these viruses in the following mail:<br>
<br>
Worm/Klez.E<br>
<br>
The mail was not delivered.<br>
<br>
You may force the delivery without further checking the mail using:<br>
<br>
avq --deliver=04347-536A3823<br>
<br>
but we would not advise to do so. You should delete it with:<br>
<br>
avq --remove=04347-536A3823<br>
<br>
For more information, please read the manual page avmailgate(icon_cool.gif.<br>
<br>
<br>
----------Mail-Info----------<br>
From: winson246 &lt;winson246@sohu.com&gt;<br>
To: webmaster@fruitron.com.cn<br>
Subject: Marginheight<br>
Mail-From: suscono@pub.dgnet.gd.cn<br>
Rcpt: webmaster@fruitron.com.cn<br>
Queue-Id: 04347-536A3823<br>
Status: The mail was not delivered!<br>
-----------------------------<br>
<br>
<br>
-----------Log-File----------<br>
info: extracting attachment 1 to /var/tmp/av-06051-U43SFi/av-0<br>
(encoding="quoted-printable", name="(no name)", filename="(no name)")<br>
info: extracting attachment 2 to /var/tmp/av-06051-U43SFi/av-1<br>
(encoding="base64", name="Vebnq.pif", filename="(no name)")<br>
info: extracting attachment 3 to /var/tmp/av-06051-U43SFi/av-2<br>
(encoding="base64", name="frame", filename="(no name)")<br>
checking file "/var/tmp/av-06051-U43SFi/av-0"<br>
checking file "/var/tmp/av-06051-U43SFi/av-1"<br>
checking file "/var/tmp/av-06051-U43SFi/av-2"<br>
-----------------------------<br>
*********************************************************************<br>
For more information on AntiVir please visit our web site<br>
http://www.antivir.de or http://www.hbedv.com<br>
mailto: info@antivir.de<br>
<br>
AntiVir is a registered trademark of<br>
H+BEDV Datentechnik GmbH<br>
*********************************************************************<br>
<br>
<br>
二、<br>
<br>
*********************************************************************<br>
AntiVir Virus Alert<br>
*********************************************************************<br>
This version of AntiVir MailGate is licensed for private and non-commercial use.<br>
*********************************************************************<br>
<br>
AntiVir found these viruses in a mail for you from winson246 &lt;winson246@sohu.com&gt;:<br>
<br>
Worm/Klez.E<br>
<br>
The mail was not delivered.<br>
<br>
AntiVir MailGate prevented a virus delivery. But if you need to<br>
receive further email from winson246 &lt;winson246@sohu.com&gt;,<br>
you should ask him/her to buy a professional antivirus software such<br>
as AntiVir from H+BEDV Datentechnik GmbH. He/She can contact<br>
mailto:sales@hbedv.com for further information.<br>
<br>
----------Mail-Info----------<br>
From: winson246 &lt;winson246@sohu.com&gt;<br>
To: webmaster@fruitron.com.cn<br>
Subject: Marginheight<br>
-----------------------------<br>
<br>
*********************************************************************<br>
For more information on AntiVir please visit our web site<br>
http://www.antivir.de or http://www.hbedv.com<br>
mailto: info@antivir.de<br>
<br>
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