To ensure that your network data is secure, you need to have a firewall. In the most basic sense, a firewall is a software or hardware system capable of preventing unauthorized access from and to your network. Ideally, your firewall configuration should consist of software and hardware firewall.
But how exactly does a firewall protect a network from threats? If you are taking your CompTIA A+ Certification practice test and preparing for the actual certification exam, here’s a refresher on basic firewall principles from CertBlaster:
Main functions of a firewall
A firewall is typically utilized for preventing unauthorized users from gaining access to private network systems that are connected to the Internet. The firewall will screen all data that enters or leaves the intranet and then scrutinize every packet. If a data packet doesn’t meet the set security criteria, the firewall will block it.
Aside from screening and restricting access to network and computer systems, a firewall could likewise be utilized for enabling remote access or logins to private networks via secure authentication logins or certificates.
In general, a firewall is programmed to safeguard against unauthenticated and potentially hazardous interactive logins. The main purpose of this is to prevent malicious users or hackers from accessing the machines in your network. More advanced firewalls are capable of blocking traffic that comes from outside, but allow authenticated users within the network to communicate with the outside world as safely as possible.
Other important things to remember
Firewalls could take more configuring and tuning than all the other kinds of security software. Remember that everyone’s network systems and circumstances are different, which means that there’s no one-fits-all firewall configuration.
These differences might likewise be dependent on the specific context, such that you might probably need different or more protection in your office than in your home network.
Having an accurately configured firewall system is an excellent way to screen traffic that comes into and out of a network to help safeguard the system from the unknown. When combined with other security solutions, such as anti-malware, you could significantly reduce the risk of cybercriminals accessing your network and exploiting it for their malicious purposes.