EX300 Harry Practice Questions
The free EX300: Red Hat Certified Engineer (RHCE) questions that deal with harry, with answers and explanations. The full bank and the timed practice test cover every topic the exam asks about.
Question #2
In accordance with the following requirements to deploy ssh login service: harry belongs to example.com which can remote login your systems. However, users of remote.test cannot use ssh login to your machine.
Type your answer, then reveal.
Correct answer: grep sshd /etc/hosts.allow -> sshd:.example.com; grep sshd /etc/hosts.deny -> sshd:.remote.test
Explanation
Notice: tcp_wrappers has two configuration files and their priority level is /etc/hosts.allow->/etc/hosts.deny
Question #3
Configure an email server domain30.example.com, and it requests to send and receive emails from the local server or the user harry can send or receive emails from network. The email of user harry is /var/spool/mail/harry. Please note: the DNS server has already been MX record analyzed.
Match each item to its target.
Correct answer: yum install -y postfix; inet_interfaces = all; mydestination = example.com, domain30.example.com, localhost; mynetworks = 172.16.30.0/24, 127.0.0.1/8; service postfix restart; chkconfig postfix on
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