Operation As The Secondary Filter - KAPERSKY ANTI-VIRUS 5.0 - FOR LINUX FREEBSD-OPENBSD MAIL SERVER Administrator's Manual

Typical patterns of product deployment
2.3. Operation as the secondary
filter
Kaspersky Anti-Virus
your mail server had a mail traffic filter when Kaspersky Anti-Virus
you have to define which of the mail filters (Kaspersky Anti-Virus
installed earlier) will be the primary filter and which will be secondary. Selection
criterion is by the filtering method.
The primary filter (we shall call this MX1) is the one that filters mail traffic based
on the sender's IP address. Such a filter is installed as the first one on the
th
server's 25 port. It receives incoming mail, filters it, and then passes it to the
secondary filter for processing. The secondary filter (we shall call this MX2) is
installed on the same host as the primary one but is assigned another IP address
and another port.
If no filter based on the sender's IP address is installed on your server, you can
install Kaspersky Anti-Virus
filter is installed, install the anti-virus as a secondary filter. The reason for this is
that all the mail traffic scanned by Kaspersky Anti-Virus
IP-address. Therefore, filtering mail by IP after anti-virus processing will make no
sense.
The Internet
Figure 3. Diagram of Kaspersky Anti-Virus
as a secondary filter on the same server with the mail system
Make the following settings for the primary and the secondary filters:
Primary filter (MX1) settings:
Name of the host where the filter is installed:
The filter's IP address: all the available.
®
can be used as either a primary or a secondary filter. If
®
as a primary filter. In the event that an IP-based
SMTP,
outgoing
traffic
SMTP on
port 25,
incoming
traffic
Server running UNIX system
Anti-virus filter
(MX2)
SMTP
Filter
(filtering)
MX1
®
mx1.yourhost.domain
®
was installed,
®
or the one
®
goes out from the same
SMTP
SMTP on
port 25,
outgoing traffic
operation
16
Intranet