ZyXEL Communications 1050 - Firewall Commands

Chapter 14 Firewall
ZyWALL (ZLD) CLI Reference Guide
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Your customized rules take precedence and override the ZyWALL’s default settings. The
ZyWALL checks the schedule, user name (user’s login name on the ZyWALL), source IP
address, destination IP address and IP protocol type of network traffic against the firewall
rules (in the order you list them). When the traffic matches a rule, the ZyWALL takes the
action specified in the rule.
For example, if you want to allow a specific user from any computer to access one zone by
logging in to the ZyWALL, you can set up a rule based on the user name only. If you also
apply a schedule to the firewall rule, the user can only access the network at the scheduled
time. A user-aware firewall rule is activated whenever the user logs in to the ZyWALL and
will be disabled after the user logs out of the ZyWALL.
14.2 Firewall Commands
The following table identifies the values required for many of these commands. Other input
values are discussed with the corresponding commands.
The following table describes the commands available for the firewall. You must use the
configure terminal command to enter the configuration mode before you can use these
commands.
Table 49 Input Values for General Firewall Commands
LABEL DESCRIPTION
address_object The name of the IP address (group) object. You may use 1-31 alphanumeric
characters, underscores(
_), or dashes (-), but the first character cannot be a
number. This value is case-sensitive.
user_name The name of a user (group). You may use 1-31 alphanumeric characters,
underscores(_), or dashes (-), but the first character cannot be a number.
This value is case-sensitive.
zone_object The name of the zone. You may use 1-31 alphanumeric characters,
underscores(_), or dashes (-), but the first character cannot be a number.
This value is case-sensitive.
schedule_object The name of the schedule. You may use 1-31 alphanumeric characters,
underscores(_), or dashes (-), but the first character cannot be a number.
This value is case-sensitive.
service_name The name of the service (group). You may use 1-31 alphanumeric characters,
underscores(_), or dashes (-), but the first character cannot be a number.
This value is case-sensitive.
Table 50 Command Summary: Firewall
COMMAND DESCRIPTION
[no] connlimit max-per-host <1..8192> Sets he highest number of sessions that the
ZyWALL will permit a host to have at one time.
The no command removes the settings.
firewall <1..5000> Enters the firewall sub-command mode to set
a firewall rule.
<1..5000>: the priority number of a firewall
rule.
action <allow|deny|reject> Sets the action the ZyWALL takes when
packets match this rule.
[no] activate Enables a firewall rule. The
no command
disables the firewall rule.