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Dr.Morena is a tool to confirm the rule configuration of a Firewall. The configuration of a Firewall is done by combining more than one rule. Sometimes a rule configuration may reside in a place other than the basic rule configuration place. In such a case, it is difficult to confirm whether it is an intended configuration by the system administrators. (Is an unnecessary hole open, or is a necessary hole open?) So, we developed a tool which checks the rule of a Firewall. We prepare a computer which has two network interface for this tool. Then, each network interface is connected to each of the network interfaces on both sides of the Firewall. The packet the source IP address and the destination IP address is forged and sent to the Firewall from one network interface. The packet which passed through the Firewall is confirmed in the other network interface. The rule of the Firewall is confirmed from the packets which passed through the Firewall, and the packets which didn't pass. This tool can check the rules without depending on the way of the Firewall is configures. |
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