Interactive Flashcards
Compliance with company policy requires a quarterly review of firewall rules. You are asked to conduct a review on the internal firewall sitting between several internal networks. The intent of this firewall is to make traffic more secure. Given the following information perform the tasks listed below:
Untrusted zone: 0.0.0.0/0
User zone: USR 10.1.1.0/24
User zone: USR2 10.1.2.0/24
DB zone: 10.1.4.0/24
Web application zone: 10.1.5.0/24
Management zone: 10.1.10.0/24
Web server: 10.1.5.50
MS-SQL server: 10.1.4.70
MGMT platform: 10.1.10.250
Instructions: To perform the necessary tasks, please modify the DST port, SRC zone, Protocol, Action, and/or Rule Order columns. Type ANY to include all ports. Firewall ACLs are read from the top down. Once you have met the simulation requirements, click Save. When you have completed the simulation, please select the Done button to submit. Once the simulation is submitted, please select the Next button to continue.
Task 1: A rule was added to prevent the management platform from accessing the internet. This rule is not working. Identify the rule and correct this issue.
In Rule no. 1 edit the Action to Deny to block internet access from the management platform.
Task 2: The firewall must be configured so that the SQL server can only receive requests from the web server.
In Rule no. 6 from top, edit the Action to be Permit.
Task 3: The web server must be able to receive unencrypted requests from hosts inside and outside the corporate network.
In rule no. 5 from top, change the DST port to Any from 80 to allow all unencrypted traffic.
Task 4: Ensure the final rule is an explicit deny
Enter this at the bottom of the access list i.e. the line at the bottom of the rule:
Task 5: Currently the user zone can access internet websites over an unencrypted protocol.
Modify a rule so that user access to websites is over secure protocols only.
In Rule number 4 from top, edit the DST port to 443 from 80
Step 1: Verify that the certificate is valid or not. In case of any warning message, cancel the
download.
Step 2: If certificate issue is not there then, download the file in your system.
Step 3: Calculate the hash value of the downloaded file.
Step 4: Match the hash value of the downloaded file with the one which you selected on the
website.
Step 5: Install the file if the hash value matches.
Given the scenario, download, verify, and install the patch in the most secure manner.
The last install that is completed will be the final submission.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Since we need to do this in the most secure manner possible, they should not be used.Finally, the second link was used and the MD5 utility of MD5sum should be used on the install.exe file as shown. Make sure that the hash matches.
Finally, type in install.exe to install it and make sure there are no signature verification errors.
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