How do you secure a web server from hackers?

Data must be validate on clint side and server side and good practic is use quree in store procedure because when any exception accur you sensitive information such table name coulm name doesnt visiable

There are couple of Ways you can do.1)Activate Firewall.2)Use SSL Certificate.3)Data must be validated on Server Side (if you have a website running).4)Keep the Software up to date on Server.

You can use firewall on web server.