11.5.1. Prerequisites
You'll need a PC with Pentium 3 compatible CPU or newer, at least 256MB of RAM and a
CD/DVD drive toboot from. TheLinuxDefender system willhave to receive theSMTP traffic
instead of the real mail server. There are several ways to make this setup.
1. Change the IP of your real mail server and assign the old IP to the LinuxDefender system
2. Change your DNS records so that the MX entry for your domains is pointing to the
LinuxDefender system
3. Setup your email clients to use the new LinuxDefender system as SMTP server
4. Change your firewall settings to forward / redirect all SMTP connections to the LinuxDe-
fender system instead of the real mail server
LinuxDefender howto will notexplain any of the above issues. Formore information you may
consult Linux Networking guides and Netfilter documentation.
11.5.2. The email toaster
Boot your LinuxDefender CD and wait until the X Windows system is loaded and functional.
To configure BitDefender SMTP Proxy, double-click the BitDefender Remote Admin icon
from the desktop. The following window will appear. Use bd username and bd password to
log into BitDefender Remote Admin.
After a successful login, you'll be able to configure BitDefender SMTP Proxy.
Choose SMTP Proxy to configure the real mail server you want to protect against spam and
viruses.
Select Email domains tab to enter all email domains you want to accept email for.
Press the Add Email Domain or Add Bulk Domains and follow the on-screen instructions
to set the relay email domains.
Select Net domains tab to enter all networks you want to relay email for.
Press the Add Net Domain or Add Bulk Net Domains and follow the on-screen instructions
to set the relay network domains.
Select Antivirusfrom the leftmenu, to choosewhat to dowhen a virusis found andto configure
other antivirus options.
Now, allSMTP traffic isscanned and filteredby BitDefender. Bydefault, all virused messages
are cleanedor dropped andall spam messagesdetected by BitDefenderare tagged inthe Subject
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LinuxDefender howto
BitDefender
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