Configure the SSH Access as required:
Users can visit your two virtual machine systems via clients of domain group3.example.com through SSH remote.
Please see explanation
Explanation:
Solution 1:
Modify file /etc/hosts.allow
Add a line: sshd: 172.24.11.
Modify file /etc/hosts.deny
Add a line: sshd: 172.25.0.
Both of them need to be configured.
Solution 2:
Add a firewall
firewall-cmd –zone=block –add-source=172.25.11.0/24 –permanent firewall-cmd –reload
Both of them need to be configured