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Lpi 117-303 Exam Syllabus Topics:

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

Question 1

Which of the following is not an iptables rule set?

A. nat
B. filter
C. mangle
D. chain

Question 2

An SELinux security context is required to ensure that all files in /opt have the default context of
system_u:object_r:usr_t. How should the corresponding configuration entry be formatted?

A. /opt/.* system_u:object_r:usr_t
B. /opt/* system_u:object_r:usr_t
C. system_u:object_r:usr_t /opt/*
D. system_u:object_r:usr_t: /opt/.*
E. system_u:object_r:usr_t /opt/.*

Question 3

What does the following iptables rule accomplish:
iptables A INPUT s !127.0.0.0/8 p tcp dport 111 j DROP

A. Drops all packets from the LAN destined for port 111.
B. Drops all packets destined for port 111 unless they are from the local machine.
C. Drops all packets originating from the local machine unless they are destined for port 111.
D. Drops all packets destined for port 111 which originate from the local machine.

Question 4

A user is attempting to connect to a remote server via SSH and receives the following message:
The authenticity of host 'mail.example.com (208.77.188.166)' can't be established.
RSA key fingerprint is 92:32:55:e9:c4:20:ae:1b:2c:d7:91:40:90:89:1c:ad.
Are you sure you want to continue connecting (yes/no)?
What does this indicate?

A. The server's SSH host key cannot be found in the list of known hosts.
B. The user's SSH client was unable to connect to the remote host's authentication agent for verification.
C. The user's SSH client is incompatible with the server's RSA key.
D. The RSA key fingerprint was found in the SpamCop database, indicating that the remote host is a known spammer.

Question 5

You wish to revoke write access for all groups and named users on a file. Which command will make the correct ACL changes?

A. setfacl x group:*:rx,user:*:rx afile
B. setfacl m group:*:rx,user:*:rx afile
C. setfacl m mask::rx afile
D. setfacl x mask::rx afile

Solutions: