Chapter 19 Firewall

Now you configure a LAN1 to WAN firewall rule that allows IRC traffic from the IP address of the CEO’s computer (192.168.1.7 for example) to go to any destination address. You do not need to specify a schedule since you want the firewall rule to always be in effect. The following figure shows the results of your two custom rules.

Figure 173 Limited LAN to WAN IRC Traffic Example

LAN1

Your firewall would have the following configuration.

Table 103 Limited LAN1 to WAN IRC Traffic Example 1

#

USER

SOURCE

DESTINATION

SCHEDULE

SERVICE

ACTION

1

Any

192.168.1.7

Any

Any

IRC

Allow

 

 

 

 

 

 

 

2

Any

Any

Any

Any

IRC

Deny

 

 

 

 

 

 

 

3

Any

Any

Any

Any

Any

Allow

 

 

 

 

 

 

 

•The first row allows the LAN1 computer at IP address 192.168.1.7 to access the IRC service on the WAN.

•The second row blocks LAN1 access to the IRC service on the WAN.

•The third row is the firewall’s default policy of allowing all traffic from the LAN1 to go to the WAN.

Alternatively, you configure a LAN1 to WAN rule with the CEO’s user name (say CEO) to allow IRC traffic from any source IP address to go to any destination address.

Your firewall would have the following configuration.

Table 104 Limited LAN1 to WAN IRC Traffic Example 2

#

USER

SOURCE

DESTINATION

SCHEDULE

SERVICE

ACTION

1

CEO

Any

Any

Any

IRC

Allow

 

 

 

 

 

 

 

2

Any

Any

Any

Any

IRC

Deny

 

 

 

 

 

 

 

3

Any

Any

Any

Any

Any

Allow

 

 

 

 

 

 

 

•The first row allows any LAN1 computer to access the IRC service on the WAN by logging into the ZyWALL with the CEO’s user name.

•The second row blocks LAN1 access to the IRC service on the WAN.

•The third row is the firewall’s default policy of allowing all traffic from the LAN1 to go to the WAN.

 

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ZyWALL 110/310/1100 Series User’s Guide