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b. Your host IP address is 172.16.1.1. Someone access from a remote host with IP address 219.168.3.4 to the HTTP server on your host. And a user on your host try to send an email to the remote system. Four packets as shown. Indicate which packets are permitted or denied and which rule is used in each case. Src Addr 219.168.3.4 172.16.1.1 Dest Addr 172.16.1.1 219.168.3.4 172.16.1.1 219.168.3.4 219.168.3.4 172.16.1.1 Packet Direction In Out Out In 2 3 4 Packet Direction Src Addr 5 In 6 Out 210.1.2.3 172.16.3.4 Dest Port Protocol TCP TCP TCP TCP Dest Addr 172.16.3.4 210.1.2.3 25 1234 80 1357 c. Someone from IP address 210.1.2.3 tries to open a connection from port 5150 on a remote host to the web proxy server on port 8080 on your host (172.16.3.4) in order to carry out an attack. The packets are shown below. Will the attack succeed? Explain your answer in details. Action Dest Port Protocol TCP TCP 8080 5150 ? ? ? Action ? ?

b. Your host IP address is 172.16.1.1. Someone access from a remote host with IP address 219.168.3.4 to the HTTP server on your host. And a user on your host try to send an email to the remote system. Four packets as shown. Indicate which packets are permitted or denied and which rule is used in each case. Src Addr 219.168.3.4 172.16.1.1 Dest Addr 172.16.1.1 219.168.3.4 172.16.1.1 219.168.3.4 219.168.3.4 172.16.1.1 Packet Direction In Out Out In 2 3 4 Packet Direction Src Addr 5 In 6 Out 210.1.2.3 172.16.3.4 Dest Port Protocol TCP TCP TCP TCP Dest Addr 172.16.3.4 210.1.2.3 25 1234 80 1357 c. Someone from IP address 210.1.2.3 tries to open a connection from port 5150 on a remote host to the web proxy server on port 8080 on your host (172.16.3.4) in order to carry out an attack. The packets are shown below. Will the attack succeed? Explain your answer in details. Action Dest Port Protocol TCP TCP 8080 5150 ? ? ? Action ? ?

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Packet 1 2 3 4 6 Packet Direction 5 In Out Src Addr 219.168.3.4 172.16.1.1 172.16.1.1 219.168.3.4 172.16.1.1 219.168.3.4 219.168.3.4 172.16.1.1 Src Addr 210.1.2.3 172.16.3.4 b. Your host IP address is 172.16.1.1. Someone access from a remote host with IP address 219.168.3.4 to the HTTP server on your host. And a user on your host try to send an email to the remote system. Four packets as shown. Indicate which packets are permitted or denied and which rule is used in each case. Direction Dest Addr In Out Out In Dest Port Protocol TCP TCP TCP TCP 25 1234 80 1357 Dest Addr 172.16.3.4 210.1.2.3 c. Someone from IP address 210.1.2.3 tries to open a connection from port 5150 on a remote host to the web proxy server on port 8080 on your host (172.16.3.4) in order to carry out an attack. The packets are shown below. Will the attack succeed? Explain your answer in details. Protocol TCP TCP Action ? ? ? ? 8080 5150 Dest Port Action ? ?
Transcribed Image Text:Packet 1 2 3 4 6 Packet Direction 5 In Out Src Addr 219.168.3.4 172.16.1.1 172.16.1.1 219.168.3.4 172.16.1.1 219.168.3.4 219.168.3.4 172.16.1.1 Src Addr 210.1.2.3 172.16.3.4 b. Your host IP address is 172.16.1.1. Someone access from a remote host with IP address 219.168.3.4 to the HTTP server on your host. And a user on your host try to send an email to the remote system. Four packets as shown. Indicate which packets are permitted or denied and which rule is used in each case. Direction Dest Addr In Out Out In Dest Port Protocol TCP TCP TCP TCP 25 1234 80 1357 Dest Addr 172.16.3.4 210.1.2.3 c. Someone from IP address 210.1.2.3 tries to open a connection from port 5150 on a remote host to the web proxy server on port 8080 on your host (172.16.3.4) in order to carry out an attack. The packets are shown below. Will the attack succeed? Explain your answer in details. Protocol TCP TCP Action ? ? ? ? 8080 5150 Dest Port Action ? ?
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