ZyXEL Communications Prestige 2602R Series User Manual page 169

Table 49 Firewall: Threshold (continued)
LABEL
Maximum
Incomplete High
TCP Maximum
Incomplete
Action taken when
the TCP Maximum
Incomplete
threshold is
reached.
Delete the oldest
half open session
when new
connection
request comes
Deny new
connection
request for
Back
Apply
Cancel
Chapter 13 Firewall Configuration
DESCRIPTION
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.
Select this radio button to clear the oldest half
open session when a new connection request
comes.
Select this radio button and specify for how
long the Prestige should block new
connection requests when TCP Maximum
Incomplete is reached.
Enter the length of blocking time in minutes
(between 1 and 255).
Click Back to return to the previous screen.
Click Apply to save your changes back to the Prestige.
Click Cancel to begin configuring this screen afresh.
Prestige 2602R 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.
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