RHCE Preparation: How To Configure SSH

• Natasha should have remote "SSH" access to your machine within example.com.

Clients within remote.test should not "SSH" your system.

1.  Check if open ssh is installed:

#rpm -qa openssh

Or

2.  Install openssh

#yum install sshd -y

#chkconfig sshd on

3. Set iptable rule for ssh service:

#iptables -I INPUT -p tcp --dport 22 -j ACCEPT

#service iptables save

4.  Allow SSH access to student user within example.com domain

#vim /etc/hots.allow

sshd: natasha.example.com

5.  Deny SSH access to remote.test

#vim /etc/host.deny

sshd: .remote.test

6.  Restart ssh Service:

#service sshd restart

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