How to raise port 80?

Question

Apache HTTP Server

Rebooted the system and found all hosts on port 80 do not work, display "It works". Has anyone experienced this and can help?
ps 443 port is working.

Answer 1

Look what took port 80?
Is there a possibility that the OS has been updated?

Answer 2

This is strange. After all, just on port 443, virtual hosts should work as one virtual host, because HTTP browser does not send ServerName headers.
Look at the config. From the manual

NameVirtualHost *:80    
<VirtualHost *:80>
    ServerName localhost
    ServerAdmin [email protected]
    DocumentRoot "/Users/USERNAME/sites"  
    ErrorLog "/Users/USERNAME/sites/error.log"
    <Directory "/Users/USERNAME/sites">
          Options Indexes FollowSymLinks
          AllowOverride All
          Order allow,deny
          Allow from all
    </Directory>
</VirtualHost>