Static dynamic state stateful stateless

Distinguish between the following types of firewalls without using the words themselves in your answer (static dynamic state stateful stateless): (6 pts) Q: Suppose you have a file named as test.log and as a security administrator you want to keep up to date about the updates in that file and save the updated data to a file named as test_saved.log on runtime without losing previous data in test_saved.log. How would you do that? (4 pts) Ans: Q: What is the difference between NIDS and HBIDs? (No more than two lines) (2 pts) Q: Define the main components of an IPS in hierarchal manner representing which part requires input from what other parts. (name and 1 line each part) (3 pts) Ans: Q: Install a firewall management library of your own choice using terminal.(5 pts) Take a screenshot of empty firewall rule base Block all FTP traffic coming in the machine Block port that caries FTP traffic Take screenshot of updated rule base Q: Suppose there are two users (1 & 2) and three assets (11 12 & 13). And a binary function is used to represent access rules and map user’s access to assest for example R(111) which takes in 2 arguments a user and an asset and maps it to true or false decision. To represent that an access must be blocked in logical language we use negation function NOT (R(111)) which means the access of asset 11 to user 1 is restricted. Using this method an access policy configuration can then be represented as conjunction (&) of different rules for example: Conf1 = R(111) & R(112) & R(113) & R(211) & R(212) & R(213) In above example configuration 1 shows that all the users have access to all the assets. Now following same principle write down all the configurations in which all access request from user 2 are blocked. (5 pts) Ans: Q: Consider again the previouse emample. Conf1 = R(111) & R(112) & R(113) & R(211) & R(212) & R(213) In above example configuration 1 shows that all the users have access to all the assets. Now assume that the administrator must change/optimize access control by changing access configuration against a risk value which comes from a function Threat(111) = [01]which can be maped to a value between 0 to 1 depending upon the situation. Our acceptable risk threashold is 0.75 which means if the value of function Threat(111) becomes greater than or equal to bearable threashold (0.75) the corresponding access must be revoked. Now bieng a security admin you are incharge for observing the threat values and selecting correspoding configurations. At time t=0 the current configuration is: Conf1 = R(111) & R(112) & R(113) & R(211) & R(212) & R(213) At time t=1 you received a warning along with folowing threat values: Threat(1 11)=0.8 Threat(1 12)=0.89 Threat(1 13)=0.75 Threat(2 11)=0.75 Threat(2 12)=0.75 Threat(2 13)=0.6 At time t=20 you received a warning along with folowing threat values: Threat(1 11)=0.6 Threat(1 12)=0.89 Threat(1 13)=0.75 Threat(2 11)=0.75 Threat(2 12)=0.75 Threat(2 13)=0.69 At time t=30 you received a warning along with folowing threat values: Threat(1 11)=0.6 Threat(1 12)=0.89 Threat(1 13)=0.75 Threat(2 11)=0.75 Threat(2 12)=0.79 Threat(2 13)=0.7 Write down all the configurations which can be permitted on T=10 T=20 and T=30 (5 pts)

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