We have an Amazon EC2 Linux web server which has been running fine for many months now without issues. Then on the weekend, we were unable to reach the website by trying to go to www.domain.com. By the way, we tried accessing the website by both IP and name and neither were accessible. The only way we were able to do so, was by restarting the httpd service. This happened on at least 4 or 5 different occasions. Once we restarted the service, the website was accessible.
Are there any logs that I can check? Anything in particular that you might think it could be?