Chapter 22 Firewall

Table 108 Configuration > Firewall > Add (continued)

LABEL

DESCRIPTION

Description

Enter a descriptive name of up to 60 printable ASCII characters for the

 

firewall rule. Spaces are allowed.

 

 

Schedule

Select a schedule that defines when the rule applies. Otherwise, select

 

none and the rule is always effective.

 

 

User

This field is not available when you are configuring a to-ZyWALL rule.

 

Select a user name or user group to which to apply the rule. The firewall

 

rule is activated only when the specified user logs into the system and

 

the rule will be disabled when the user logs out.

 

Otherwise, select any and there is no need for user logging.

 

Note: If you specified a source IP address (group) instead of any in

 

the field below, the user’s IP address should be within the IP

 

address range.

 

 

Source

Select a source address or address group for whom this rule applies.

 

Select any if the policy is effective for every source.

 

 

Destination

Select a destination address or address group for whom this rule

 

applies. Select any if the policy is effective for every destination.

 

 

Service

Select a service or service group from the drop-down list box.

 

 

Access

Use the drop-down list box to select what the firewall is to do with

 

packets that match this rule.

 

Select deny to silently discard the packets without sending a TCP reset

 

packet or an ICMP destination-unreachable message to the sender.

 

Select reject to deny the packets and send a TCP reset packet to the

 

sender. Any UDP packets are dropped without sending a response

 

packet.

 

Select allow to permit the passage of the packets.

 

 

Log

Select whether to have the ZyWALL generate a log (log), log and alert

 

(log alert) or not (no) when the rule is matched. See Chapter 46 on

 

page 723 for more on logs.

 

 

OK

Click OK to save your customized settings and exit this screen.

 

 

Cancel

Click Cancel to exit this screen without saving.

22.3 The Session Limit Screen

Click Configuration > Firewall > Session Limit to display the Firewall Session Limit screen. Use this screen to limit the number of concurrent NAT/ firewall sessions a client can use. You can apply a default limit for all users and

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ZyWALL USG 50 User’s Guide