Chapter 19 Firewall
Figure 184 Limited LAN to WAN IRC Traffic Example
Your firewall would have the following configuration.
Table 86 Limited LAN to WAN IRC Traffic Example 1
# | USER | SOURCE | DESTINATION | SCHEDULE | SERVICE | ACTION |
1 | Any | 192.168.1.7 | Any | Any | IRC | Allow |
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2 | Any | Any | Any | Any | IRC | Deny |
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Default | Any | Any | Any | Any | Any | Allow |
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•The first row allows the LAN computer at IP address 192.168.1.7 to access the IRC service on the WAN.
•The second row blocks LAN access to the IRC service on the WAN.
•The third row is (still) the firewall’s default policy of allowing all traffic from the LAN to go to the WAN.
Alternatively, you configure a LAN 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 87 Limited LAN to WAN IRC Traffic Example 2
# | USER | SOURCE | DESTINATION | SCHEDULE | SERVICE | ACTION |
1 | CEO | Any | Any | Any | IRC | Allow |
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2 | Any | Any | Any | Any | IRC | Deny |
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Default | Any | Any | Any | Any | Any | Allow |
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•The first row allows any LAN computer to access the IRC service on the WAN by logging into the ZyWALL with the CEO’s user name.
•The second row blocks LAN access to the IRC service on the WAN.
•The third row is (still) the firewall’s default policy of allowing all traffic from the LAN to go to the WAN.
The rule for the CEO must come before the rule that blocks all LAN to WAN IRC traffic. If the rule that blocks all LAN to WAN IRC traffic came first, the CEO’s IRC traffic would match that rule and the ZyWALL would drop it and not check any other firewall rules.
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ZyWALL USG 300 User’s Guide |
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