ZyXEL Communications Prestige 652H series User Manual page 189

LABEL
One Minute High
Maximum
Incomplete Low
Maximum
Incomplete High
TCP Maximum
Incomplete
Action taken when the TCP Maximum Incomplete threshold is reached.
Firewall Screens
Table 13-7 Firewall Threshold
DESCRIPTION
This is the rate of new half-open sessions that
causes the firewall to start deleting half-open
sessions. When the rate of new connection
attempts rises above this number, the Prestige
deletes half-open sessions as required to
accommodate new connection attempts.
This is the number of existing half-open
sessions that causes the firewall to stop
deleting half-open sessions. The Prestige
continues to delete half-open requests as
necessary, until the number of existing half-
open sessions drops below this number.
This is the number of existing half-open
sessions that causes the firewall to start
deleting half-open sessions. When the number
of existing half-open sessions rises above this
number, the Prestige deletes half-open
sessions as required to accommodate new
connection requests. Do not set Maximum
Incomplete High to lower than the current
Maximum Incomplete Low number.
This is the number of existing half-open TCP
sessions with the same destination host IP
address that causes the firewall to start
dropping half-open sessions to that same
destination host IP address. Enter a number
between 1 and 256. As a general rule, you
should choose a smaller number for a smaller
network, a slower system or limited bandwidth.
Prestige 652H/HW Series User's Guide
DEFAULT VALUES
100 half-open sessions per
minute. The above numbers
cause the Prestige to start
deleting half-open sessions when
more than 100 session
establishment attempts have
been detected in the last minute,
and to stop deleting half-open
sessions when fewer than 80
session establishment attempts
have been detected in the last
minute.
80 existing half-open sessions.
100 existing half-open sessions.
The above values causes the
Prestige to start deleting half-
open sessions when the number
of existing half-open sessions
rises above 100, and to stop
deleting half-open sessions with
the number of existing half-open
sessions drops below 80.
10 existing half-open TCP
sessions.
13-27