User manual

Firewall
179
Enter your LAN’s SMTP mail server address as the Destination SMTP server.
Check Send keep alive bytes to requesting server to send keep alive traffic to the
source SMTP server. This option is only useful on slow network connections where the
source server is timing out before the SG unit has finished its virus checking.
When Inform requesting server of rejected mail is enabled the SG unit rejects
incoming mail that is detected to have a virus, and informs the requesting SMTP server
that the mail has been dropped. This is the default and recommended behaviour.
When Inform requesting server of rejected mail is disabled the SG unit accepts and
then subsequently drops incoming mail that is detected to contain a virus. The requesting
mail server believes the mail was delivered correctly, however the SG unit drops the mail
without a notification being sent to either the sender of the mail or the requesting server.
Typically, the default Network timeout for this is appropriate and should only be
changed if there are time out problems.
You may specify the Maximum simultaneous SMTP sessions to set the maximum
number of simultaneous SMTP connections. Increasing this increases the resources
consumed by virus scanning.
Click Submit.
Web
The SG unit can scan incoming web traffic for viruses.
Note
Enabling this automatically enables Access Control.