System Security In this question, you will help Mallory develop new ways to conduct denial of service (DoS) attacks (1) CHARGEN and ECHO are services provided by some UNIX servers For every UDP packet arriving at port 19, CHARGEN sends back a packet with 0 to 512 random characters For every UDP packet arriving at port 7, ECHO sends back a packet with the same content Mallory wants to perform a DoS attack on two servers One with IP address M supports CHARGEN, and another with IP address N supports ECHO Mallory can spoof IP addresses Is it possible to create a single UDP packet with no content which will cause both servers to consume a large amount of bandwidth If yes, describe the header (i e , source IP, destination IP, source port, and destination port) of your UDP package otherwise, explain why Assume now that CHARGEN and ECHO are now modified to only respond to TCP packets (post handshake) and not UDP Is it possible to create a single TCP SYN packet with no content which will cause both servers to consume a large amount of bandwidth If yes, describe the header (i e , source IP, destination IP, source port, and destination port) of your UDP package otherwise, explain why (2) A typical web server maintains a connection after receiving each TCP connection request Write down the name of the transport layer attack that can cause denial of service on the web server which works by consuming a large amount of server memory

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System Security In this question, you will help Mallory develop new ways to conduct denial-of-service (DoS) attacks. (1) CHARGEN and ECHO are services provided by

System Security

In this question, you will help Mallory develop new ways to conduct denial-of-service (DoS) attacks.

(1) CHARGEN and ECHO are services provided by some UNIX servers. For every UDP packet arriving at port 19, CHARGEN sends back a packet with 0 to 512 random characters. For every UDP packet arriving at port 7, ECHO sends back a packet with the same content.

Mallory wants to perform a DoS attack on two servers. One with IP address M supports CHARGEN, and another with IP address N supports ECHO. Mallory can spoof IP addresses.

Is it possible to create a single UDP packet with no content which will cause both servers to consume a large amount of bandwidth? If yes, describe the header (i.e., source IP, destination IP, source port, and destination port) of your UDP package; otherwise, explain why?
Assume now that CHARGEN and ECHO are now modified to only respond to TCP packets (post-handshake) and not UDP. Is it possible to create a single TCP SYN packet with no content which will cause both servers to consume a large amount of bandwidth? If yes, describe the header (i.e., source IP, destination IP, source port, and destination port) of your UDP package; otherwise, explain why?

(2) A typical web server maintains a connection after receiving each TCP connection request. Write down the name of the transport layer attack that can cause denial-of-service on the web server which works by consuming a large amount of server memory.