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NEW QUESTION 28
A Linux administrator needs to configure a new firewall without an existing ACL to allow incoming web traffic.
The firewall must log the allowed network traffic. Which of the following command sequences would accomplish this task when they are executed in order?

A. iptables -A INPUT -m multiport -p tcp --dports 80,443 -J LOG
iptables -A INPUT -m multiport -p tcp --dports 80,443 -J ACCEPTB. iptables -A INPUT -p tcp --dport 80 -J LOG
iptables -A INPUT -p tcp --dport 443 -J LOG
iptables -I INPUT -p tcp --dport 80 -J ACCEPT
iptables -I INPUT -p tcp --dport 443 -J ACCEPTC. iptables -A INPUT -p tcp --dport 80 -J ACCEPT
iptables -A INPUT -p tcp --dport 443 -J ACCEPT
iptables -A INPUT -p tcp --dport 80 -J LOG
iptables -A INPUT -p tcp --dport 443 -J LOGD. iptables -I INPUT -m multiport -p tcp --dports 80,443 -J LOG
iptables -I INPUT -m multiport -p tcp --dports 80,443 -J ACCEPT

Answer: B

 

NEW QUESTION 29
An issue was discovered on a testing branch of a Git repository. A file was inadvertently modified and needs to be reverted to the master branch version. Which of the following is the BEST option to resolve the issue?

A. git merge master testingB. git checkout master -- fileC. git branch -b master fileD. git stash branch master

Answer: B

Explanation:
Explanation/Reference:
Reference: https://www.git-scm.com/book/en/v2/Git-Basics-Undoing-Things

 

NEW QUESTION 30
A system administrator has set up third-party log aggregation agents across several cloud instances. The systems administrator wants to create a dashboard of failed SSH attempts and the usernames used.
Which of the following files should be watched by the agents?

A. /var/log/monitorB. /etc/rsyslog.confC. /var/log/kern.logD. /var/log/audit/audit.log

Answer: B

 

NEW QUESTION 31
A Linux administrator has installed a web application firewall in front of a web server running on HTTP port
8080 and successfully started the HTTP server. However, after opening the application URL in an Internet browser, the administrator discovered that the application does not work. The administrator performed the following diagnostic steps:
Output of sysctl -a command:

Output of iptables -L command:

Output of netstat -nltop | grep "8080":

Which of the following is the NEXT step the administrator should perform to permanently fix the issue at the kernel level?

A. Add iptables rule iptables -A FORWARD-m state --state NEW -p tcp --dport 8080 -j ACCEPT then restart httpd daemonB. Add iptables rule iptables -A INPUT -m state --state NEW -p tcp --dport 8080 -j then restart httpd daemonC. sysctl -w net.ipv4.ip_forward=1 then run sysctl -w /etc/sysctl.conf to enable the changeD. Edit /etc/sysctl.conf file and add net.ipv4.ip_forward = 1 then run sysctl -p /etc/ sysctl.conf to enable the change

Answer: A

 

NEW QUESTION 32
A new packages repository named repo10 has been installed on mirror site. A Linux administrator wants to use this new repository for local package installations. In which of the following locations should the administrator store the configuration information for the repo10 repository?

A. /etc/yum.reps.d/repo10.RepoB. /etc/yum_repo.d/repo10C. /etc/yum.confD. /etc/yum.reps.d/repo10

Answer: A

 

NEW QUESTION 33
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