User Guide

Chapter 6 91
The kas3scan service limits the number of simultaneous connections
and uses the smtp_send_xforward_command option to transfer the IP-
address of the sender server to the kas-pipe module.
To implement this scheme, do the following:
1. In the filter.conf configuration file, specify the following values:
ClientConnectTo tcp:127.0.0.1:2277
PipeMultipleMessagesAllowed Yes
PipeInProtocol smtp
PipeOutProtocol smtp
PipeOutgoingAddr tcp:127.0.0.1:9025
PipeUseXForward yes
2. Modify the Postfix configuration file (master.cf) as follows:
smtp inet n - n - - smtpd
### KASPERSKY ANTI-SPAM BEGIN ###
-o content_filter=kas3scan:127.0.0.1:9026
### KASPERSKY ANTI-SPAM END ###
pickup fifo n - n 60 1 pickup
### KASPERSKY ANTI-SPAM BEGIN ###
-o content_filter=kas3scan:127.0.0.1:9026
### KASPERSKY ANTI-SPAM END ###
### KASPERSKY ANTI-SPAM BEGIN ###
127.0.0.1:9026 inet n n n - 20 spawn
user=mailflt3 argv=/usr/local/ap-mailfilter3/bin/
kas-pipe
127.0.0.1:9025 inet n - n - 25 smtpd
-o smtpd_authorized_xforward_hosts=127.0.0.0/8
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=