ZyXEL Communications 1000 User Manual

Chapter 24 Firewall

ZyWALL USG 1000 User’s Guide

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 

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 

 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.

Table 113   Configuration > Firewall > Add (continued)