Why doesn't Apache listen on my IP address?
On cPanel servers Apache is configured to listen on All IP addresses by default.
Although it is possible to prevent Apache from listening on an IP address by using the Reserved IPs Editor in WHM.
If Apache is not listening on one of your IP addresses you can check to see if the IP is reserved with the following steps:
1. Login to WHM as the root user
2. Navigate to: Home »Service Configuration »Apache Configuration »Reserved IPs Editor
3. If the IP has a check next to it, remove the check and click save
4. Click the button to rebuild the Apache configuration and restart apache