user manual
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 to boot from. The LinuxDefender system will have to receive the SMTP 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 not explain any of the above issues. For more 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 Antivirus from the left menu, to choose what to do when a virus is found and to configure
other antivirus options.
Now, all SMTP traffic is scanned and filtered by BitDefender. By default, all virused messages
are cleaned or dropped and all spam messages detected by BitDefender are tagged in the Subject
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LinuxDefender howto
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