Most of the functioning of any business rely on its database. What if its database is vulnerable? What to do if your information is insecure and easily hacked by cyber criminals? The answer to such questions is Firewall.
What is Firewall?
A firewall is a software or hardware for controlling the exposure of the services to the network, i.e., managing the access to each port except those requiring public access.
When we talk about a typical server, several services run by default. These services can be divided into the following groups:
- Public services: These services are accessible by all on the Internet. For example: Web server.
- Private services: Access to these services is limited to a selected group of authorized accounts or from particular location. For example- Database control panel.
- Internal services: Such services can be accessed only from within the server, without providing any knowledge of the services to the outside world. For example- Database accepting local connections only.
Firewalls make it sure that the access to your software is as per the above categories. Public services are made left open while private services are restricted by different required criteria. And internal services are made completely inaccessible to the outside world. Access in completely blocked from the unused ports.
Generally, a firewall is deployed either in-line with the database server or near the network gateway. While some database servers support host-based agents that are easy to install on the database server itself so as to monitor the local database events, the hardware-based firewalls support host/network monitoring without any additional load on the database server. In fact, you can make both the hardware appliance and software agents work simultaneously.
Why implement Firewall?
Even if your services goes through different security features, a firewall acts as an extra protection layer.
Since firewall restricts the access to everything except the specific services as per your configuration, it reduces the cyber attack to your server and also limits the components that are vulnerable to exploitation.
How Do Firewalls Enhance Security?
Firewalls are crucial part of any server configuration. Even if your services are embedded with security features or are confined to the interfaces you would like them to run on, a firewall serves as an extra layer of protection for your computer software.
A properly configured firewall will confine access to everything except the specific services you need to remain open. Disclosing only a few pieces of software reduces the attack surface of your server, limiting the components that are vulnerable to exploitation.
Above given are some of the improvements you can make to upgrade the security of your systems. It is necessary to notice that, while it’s better late than never, security measures dimish their effectiveness the longer you wait to use them. Security cannot be an afterthought and must be implemented from the start alongside the services and applications you are providing.