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LPIC-3 Exam 303: Securitys: 60 (303-200) - Linux Professional Institute Exam Questions

Last updated on June 20, 2026

97% Exam Compliance
60 Total Questions
1
Question
Which of the following commands changes the source IP address to 192.0.2.11 for all IPv4 packets

which go through the network interface eth0?
Options
A iptables ~t nat -A PREROUT1NG -\ eth0 -j SNAT -to-source 192.0.2.11
B iptables -t mangle -A POSTROUTING -0 eth0 -j SNAT -to-source 192.0.2.11
C iptables -t nat -A POSTROUTING H eth0 -j DNAT -to-source 192.0.2.11
D iptables ~t nat -A POSTROUTING ~o eth0 -j SNAT -to-source 192.0.2.11
E iptables -t mangle -A POSTROUTING -i eth0 -j SNAT -to-source 192.0.2.11
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2
Question
Which of the following prefixes could be present in the output of getcifsacl? (Choose THREE correct
Reveal Only
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3
Question
Which of the following commands displays all ebtable rules contained in the table filter including their packet and byte counters?
Options
A ebtables-L-t filter -Lv
B ebtables-L -Lc-t filter
C ebtables -t nat -L -v
D ebtables-t filter-L-Lc
E ebtables -t filter -Ln -L
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4
Question
Which of the following information, within a DNSSEC- signed zone, is signed by the key signing key?
Options
A The zone signing key of the zone.
B The RRSIG records of the zone.
C The DS records pointing to the zone
D The non-DNSSEC records like A, AAAA or MX
E The NSEC or NSEC3 records of the zone.
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5
Question
What is the purpose of IP sets?
Options
A They group together IP addresses and networks that can be referenced by the network routing table.
B They group together IP addresses and user names that can be referenced from /etc/hosts allow and /etc/hosts deny
C They group together IP addresses that are assigned to the same network interfaces.
D They group together IP addresses that can be referenced by netfilter rules.
E They group together IP and MAC addresses used by the neighbors on the local network.
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