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

1. Which GPG command will publish a public key to a public key server?

A) gpg publishkeys UID
B) gpg pushkeys UID
C) gpg sendkeys UID
D) gpg exportkeys UID

2. 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 208.77.188.166 on port 22 the internal host 10.142.232.1
C) Drops traffic on port 22 only from the hosts 208.77.188.166 and 10.142.232.1.
D) Forwards all requests from the host 10.142.232.1 on port 22 the internal host 208.77.188.166

3. The openssl command can be used to test connections with various secure services. What command will open a connection with a remote POP3S (POP3 over SSL) server?

A) openssl s_client pop.example.com:pop3s
B) openssl connect host pop.example.com:pop3s
C) openssl connect pop.example.com:pop3s
D) openssl s_client connect pop.example.com:pop3s

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

5. The system administrator wishes to use the pam_listfile.so module to restrict which users are allowed to login via SSH. Which line will configure this behaviour?

A) auth required pam_listfile.so item=user sense=deny file=/etc/sshd/sshd.deny onerr=succeed
B) auth required pam_listfile.so item=user sense=allow file=/etc/sshd/sshd.allow onerr=succeed
C) auth required pam_listfile.so item=user sense=allow file=/etc/sshd/sshd.allow onerr=fail
D) auth required pam_listfile.so item=user sense=deny file=/etc/sshd/sshd.deny onerr=fail

Solutions: