F-SECURE INTERNET GATEKEEPER WINDOWS 2000-2003 SERVER 6.61 Administrator's Manual page 147

Figure 6-2 Common / SMTP Connections settings
Max connections
Max connections per host Specify the maximum number of
Accept connections
Administering F-Secure Anti-Virus for Internet Mail
Specify the maximum number of
simultaneous connections that are accepted.
The excess connections are temporarily
rejected. Using a very high value might
increase the risk of a denial-of-service
attack.
simultaneous connections that are accepted
from a particular host. The excess
connections are temporarily rejected.
If there is only one mail server in use in the
company network, use a high value for this
setting.
If the value is specified as zero (0), there can
be an unlimited number of simultaneous
connections.
Define how a new connection is accepted.
Only Allowed Hosts - the product accepts
incoming connections only from hosts listed
in the 'Allowed Hosts' table.
All Except Denied Hosts - the product
accepts connections from all hosts, except
the ones listed in the 'Denied Hosts' table.
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