For the following problems, assume the following firewall rule table is being used to protect a...

   

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For the following problems, assume the following firewall rule table is being used to protect a local network that you administer: Rule A B C D E Packet 1 2 3 4 Direction In Out Out In Either Src addr Dest addr Protocol TCP External Internal Internal External TCP Internal External TCP External Internal TCP Any Any Any 5. (5 pts) Describe the effect of each rule. 6. (4 pts) Your SMTP server on this network has address 192.168.3.4. A remote server with IP 172.16.1.1 tries to initiate a dialogue with your host. Additionally, a process on your server will try to send email to the SMTP server on the remote system. The following packets could represent part of such an exchange: Direction In Out Out In Dest port Action 25 Permit >1023 Permit 25 Permit >1023 Permit Any Deny Src addr. Dest addr Protocol 172.16.1.1 192.168.3.4 TCP 192.168.3.4 172.16.1.1 TCP 192.168.3.4 172.16.1.1 TCP 172.16.1.1 192.168.3.4 TCP Dest port Action 25 1234 25 1357 ? ? ? ? For each packet, state whether it is permitted or denied by the rules above, and tell which rule applies. For the following problems, assume the following firewall rule table is being used to protect a local network that you administer: Rule A B C D E Packet 1 2 3 4 Direction In Out Out In Either Src addr Dest addr Protocol TCP External Internal Internal External TCP Internal External TCP External Internal TCP Any Any Any 5. (5 pts) Describe the effect of each rule. 6. (4 pts) Your SMTP server on this network has address 192.168.3.4. A remote server with IP 172.16.1.1 tries to initiate a dialogue with your host. Additionally, a process on your server will try to send email to the SMTP server on the remote system. The following packets could represent part of such an exchange: Direction In Out Out In Dest port Action 25 Permit >1023 Permit 25 Permit >1023 Permit Any Deny Src addr. Dest addr Protocol 172.16.1.1 192.168.3.4 TCP 192.168.3.4 172.16.1.1 TCP 192.168.3.4 172.16.1.1 TCP 172.16.1.1 192.168.3.4 TCP Dest port Action 25 1234 25 1357 ? ? ? ? For each packet, state whether it is permitted or denied by the rules above, and tell which rule applies.