Figure 15-4 Attack Alert; Table 15-3 Attack Alert - ZyXEL Communications ZyWall 100 User Manual

ZyWALL 100 Internet Security Gateway
1. If the Blocking Time timeout is 0 (the default), then the ZyWALL deletes the oldest existing half-open
session for the host for every new connection request to the host. This ensures that the number of half-
open sessions to a given host will never exceed the threshold.
2. If the Blocking Time timeout is greater than 0, then the ZyWALL blocks all new connection requests to
the host giving the server time to handle the present connections. The ZyWALL continues to block all
new connection requests until the Blocking Time expires.
The ZyWALL also sends alerts whenever TCP Maximum Incomplete is exceeded. The global values
specified for the threshold and timeout apply to all TCP connections. Click the Attack Alert tab to bring up
the next screen.
The following table describes the fields in this screen.
FIELD
Generate alert when
attack detected
15-8

Figure 15-4 Attack Alert

Table 15-3 Attack Alert

DESCRIPTION
A detected attack automatically generates
a log entry. Check this box to generate an
alert (as well as a log) whenever an attack
is detected. See the Logs Chapter for
more information on logs and alerts.
DEFAULT VALUES
Using the ZyWALL Web Configurator