A network technician has set up a firewall to secure the internal network. When reviewing the firewall settings, the technician notices that an external web server cannot be accessed by the internal users. The web server operates on the standard HTTP port. Which of the following rules should the technician modify to BEST resolve this issue, while maintaining security?
Block outbound on port 80
Block inbound on port 80
Allow outbound on port 80
Allow inbound on port 80