Почему нет доступа извне к веб-серверам в связке Nginx+Apache?

Host is up (0.00025s latency).
Not shown: 998 filtered ports
PORT     STATE  SERVICE
80/tcp   closed http
8080/tcp closed http-proxy

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      23962/nginx: master 
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      23939/httpd         
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      6565/sshd           
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      6672/master         
tcp6       0      0 :::22                   :::*                    LISTEN      6565/sshd           
tcp6       0      0 ::1:25                  :::*                    LISTEN      6672/master