AWS, JavaScript, React - Deploy Web Apps on the Cloud - Securing SSH with a Network Firewall

This video tutorial guides users through enhancing server security by configuring a network firewall and changing the default SSH port using the Lennode Cloud Console. It covers steps to modify the SSHD_config file, test the new port, and set up firewall rules to restrict SSH access to trusted IPs, providing an additional security layer.

What is the primary reason for changing the default SSH port from 22 to a custom port?

• To make it harder for attackers to guess the port

• To increase server speed

• To reduce server load

• To allow more users to connect simultaneously

Which file needs to be modified to change the SSH port?

• Server_config

• Network_config

• Firewall_config

• SSHD_config

What command is used to restart the SSH service after changing the port?

• sudo service SSH start

• sudo service SSH stop

• sudo service SSH reload

• sudo service SSH restart

What happens when you try to SSH into the server using the default port after changing it?

• The server reboots

• The server crashes

• The connection is refused

• The connection is successful

Which tool is used to test the new SSH port configuration?

• Terminal

• Putty

• SSH Client

• Firewall Manager

What should be selected under Default Inbound Policy to drop all unspecified connections?

• ACCEPT

• DENY

• BLOCK

• DROP

How do you specify a custom port range in the Lennode firewall?

• Select 'Default' under port

• Select 'Custom' under port

• Select 'SSH' under port

• Select 'HTTP' under port

What is the purpose of setting a source IP in the firewall configuration?

• To allow connections from any IP

• To increase server bandwidth

• To restrict SSH access to trusted IPs

• To enable faster connections

Where can you find your public-facing IP address?

• At whatismypaddress.com

• In the server logs

• On your router settings

• In the SSHD_config file

What should you do after entering the new port number in Putty?

• Click 'Delete'

• Click 'Reset'

• Click 'Cancel'

• Click 'Save'