ZyXEL Communications Prestige 662HW Series User Manual page 149

LABEL
Maximum This is the number of existing half-open sessions
Incomplete High 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.
TCP Maximum This is the number of existing half-open TCP
Incomplete 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.
Action taken when the TCP Maximum Incomplete threshold is reached.
Delete the oldest Select this radio button to clear the oldest half
half open session open session when a new connection request
when new comes.
connection request
comes
Deny new Select this radio button and specify for how long
connection request the Prestige should block new connection
for requests when TCP Maximum Incomplete is
reached.
Enter the length of blocking time in minutes
(between 1 and 256).
Back Click Back to return to the previous screen.
Apply Click Apply to save your changes back to the Prestige.
Cancel Click Cancel to begin configuring this screen afresh.
Firewall Configuration
Table 12-8 Firewall: Threshold
DESCRIPTION
Prestige 662HW Series User's Guide
DEFAULT VALUES
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.
30 existing half-open TCP sessions.
12-21