Exam EX200 topic 1 question 76 discussion

Actual exam question from RedHat's EX200

Question #: 76
Topic #: 1

[All EX200 Questions]

SIMULATION -
The firewall must be open.

Show Suggested Answer

Suggested Answer: See explanation below.
/etc/init.d/iptables start
iptables -F
iptables -X
iptables -Z
/etc/init.d/iptables save
chkconfig iptables on

by Sz0p3n at May 26, 2021, 7:34 a.m.

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Jojo02

Highly Voted 3 years, 4 months ago

if not installed: yum install -y firewalld else: systemctl enable --now firewalld.service firewall-cmd --state

upvoted 5 times

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I would agree on making the default zone to be "trusted zone" because it is completely open - see man 5 firewalld.zones -for more info $firewall-cmd --set-defualt-zone=trusted $firewall-cmd --reload $firewall-cmd --get-default-zone => that should show you trusted as your current default zone and you NIC interface s attached to it ** remember => the zones have 0ne-Many relationships i.e. NIC interface can ONLY belong to one ZONE but a ZONE can have many interfaces attached to it.

upvoted 1 times

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markeloff23

3 years ago

Firewall must be open... Disable o enable?

upvoted 2 times

ly01

4 months, 3 weeks ago

in my ignorance "must be open" -> "must be installed but not block anything" sudo firewall-cmd --set-default-zone=trusted sudo firewall-cmd --reload sudo firewall-cmd --list-all

upvoted 1 times

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Sz0p3n

3 years, 6 months ago

systemctl disable --now firewalld.service firewall-cmd --state

upvoted 3 times

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