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Lpi LPI Level 3 Exam (LPI 303: Security) Sample Questions:

1. What does the following iptables rule accomplish:
iptables A INPUT s 208.77.188.166 d 10.142.232.1 p tcp dport 22 j ACCEPT

A) Accepts traffic on port 22 only from the hosts 208.77.188.166 and 10.142.232.1.
B) Forwards all requests from the host 10.142.232.1 on port 22 the internal host 208.77.188.166
C) Forwards all requests from the host 208.77.188.166 on port 22 the internal host 10.142.232.1
D) Drops traffic on port 22 only from the hosts 208.77.188.166 and 10.142.232.1.

2. When adding additional users to a file's extended ACLs, what is true about the default behaviour of the ACL mask for the file?

A) If required, a warning is printed indicating that the mask is too restrictive for the permissions being granted.
B) The mask is modified to be the union of all permissions of the owning group and all named users and groups.
C) The mask is left unchanged.
D) The mask is modified to be the union of all permissions of the file owner, owning group and all named users and groups.

3. How does AppArmor configure its access control settings?

A) A profile is assigned per application that specifies the system resources available to the application.
B) AppArmor inspects the Linux system to determine which applications are installed and configures itself. This configuration can then be modified manually.
C) AppArmor does not require any configuration.
D) AppArmor relies on precompiled policies. These policies are updated with new releases or can be downloaded periodically.

4. Which of the following rule directives will email [email protected] and [email protected] when the Mail Configuration rule is violated?

A) (
rulename = "Mail Configuration",
severity = $(SIG_HI),
emailto = [email protected],[email protected]
)
B) (
rulename = "Mail Configuration",
severity = $(SIG_HI),
emailto = [email protected],
emailto = [email protected]
)
C) (
rulename = "Mail Configuration",
severity = $(SIG_HI),
emailto = [email protected],
emailcc = [email protected]
)
D) (
rulename = "Mail Configuration",
severity = $(SIG_HI),
emailto = [email protected];[email protected]
)

5. You have downloaded a file named file.tgz along with a signature file named file.tgz.asc. Which commands can be used to verify that file.tgz has not been tampered with since the file creator created the signature?
Assume that you have already retrieved the public key of the file creator. (Select THREE correct answers)

A) gpg verify file.tgz
B) gpgv file.tgz.asc
C) gpg verify file.tgz.asc
D) gpgv verify file.tgz.asc
E) gpg verify file.tgz.asc file.tgz

Solutions: