How to secure web servers and database servers
Web servers are one of the most targeted public faces of an organization. Securing a web server is as important as securing the website or web application itself and the network around it.
Although securing a web server can be a daunting operation and requires specialist expertise, it is not an impossible task to achieve. Long hours of research and an overdose of coffee and take away food, can save you from long nights at the office, headaches and data breaches in the future. Irrelevant of what web server software and operating system you are running, an out of the box configuration is usually insecure. Therefore one must take some necessary steps in order to increase web server security.
Click here to learn more with the help of our security tips on how to secure web servers and database servers.

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How do I know that my web application is accessed by human beings or some automated system. I came to know that many tools are available for fetching ( Crawl the web pages ) from live server and extract the data. The performance of web server is down at this time. How to prevent web application from such a spy.
Pankaj, it depends on the people implementing the automated system. Sometimes, these people are not very careful and you can detect them by looking at the User-agent header. (http://johannburkard.de/blog/www/spam/The-top-10-spam-bot-user-agents-you-MUST-block-NOW.html) If they know what you are doing it’s very complicated, next to impossible to detect them.