Firewall Commands; Table 97 Sys Firewall Commands - ZyXEL Communications P-2602HWLNI User Manual

Chapter 15 Firewall Configuration
Table 96 Firewall: Threshold (continued)
LABEL
Maximum
Incomplete High
TCP Maximum
Incomplete
Action taken when the TCP Maximum Incomplete reached threshold
Delete the Oldest
Half Open
Session when
New Connection
Request Comes.
Deny New
Connection
Request for
Apply
Cancel

15.9 Firewall Commands

The following describes the firewall commands. See the Command Interpreter appendix for
information on the command structure. Each of these commands must be preceded by
firewall
the firewall.
Table 97 Sys Firewall
COMMAND
acl
active
cnt
262
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 ZyXEL Device 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 ZyXEL Device should block new
connection requests when TCP Maximum
Incomplete is reached.
Enter the length of blocking time in minutes
(between 1 and 256).
Click Apply to save your changes back to the ZyXEL Device.
Click Cancel to begin configuring this screen afresh.
when you use them. For example, type
Commands
DESCRIPTION
Displays ACLs or a specific ACL set # and rule #.
disp
Active firewall or deactivate firewall
<yes|no>
Enables/disables the firewall.
DEFAULT VALUES
100 existing half-open sessions.
The above values causes the
ZyXEL Device 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.
sys firewall active yes
P-2602HWLNI User's Guide
sys
to turn on