You have placed a File Transfer Protocol $($FTP$)$ server in your DMZ behind your firewall. The FTP server will distribute software updates and demonstration versions of your products. However, users report that they are unable to access the FTP server.

What should you do to enable access?

answer

Open ports $20$ and $21$ for outbound connections.

Install a VPN$.$

Define user accounts for all external visitors.

Move the FTP outside of the firewall.