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Exam XK0-005 topic 1 question 187 discussion

Actual exam question from CompTIA's XK0-005
Question #: 187
Topic #: 1
[All XK0-005 Questions]

A Linux engineer needs to block an incoming connection from the IP address 2.2.2.2 to a secure shell server and ensure the originating IP address receives a response that a firewall is blocking the connection. Which of the following commands can be used to accomplish this task?

  • A. iptables -A INPUT -p tcp --dport ssh -s 2.2.2.2 -j DROP
  • B. iptables -A INPUT -p tcp --dport ssh -s 2.2.2.2 -j RETURN
  • C. iptables -A INPUT -p tcp --dport ssh -s 2.2.2.2 -j REJECT
  • D. iptables -A INPUT -p tcp --dport ssh -s 2.2.2.2 -j QUEUE
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Suggested Answer: C 🗳️
by Damon54 at Aug. 23, 2023, 3:42 p.m.

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bongobo
11 months, 1 week ago
both DROP & REJECT works
upvoted 2 times
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stonefacegroupie1
1 year, 2 months ago
Selected Answer: C
I agree with Damon54
upvoted 1 times
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Damon54
1 year, 5 months ago
Selected Answer: C
In general, use REJECT if you want the other side to know that the port is unreachable, and DROP for connections to hosts you don't want to see.
upvoted 4 times
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