Karlton, a network technician, installs a firewall and opens ports 80 and 443. He can reach the website, but testing the Secure Shell (SSH) service from the Wide Area Network (WAN) results in access being denied. What MOST LIKELY caused this issue?

Contains practice exam questions from all eight adomains and are weighted for the real Certified Information Systems Security Professional (CISSP) exam as follows:    
15% from Security and Risk Management    
10% from Asset Security    
13% from Security Architecture and Engineering    
13% from Communication and Network Security    
13% from Identity and Access Management (IAM)    
12% from Security Assessment and Testing    
13% from Security Operations    
11% from Software Development Security