Without firewalls, if a computer has a publicly addressable IP – for instance, if it is directly connected via ethernet – then any network service that is currently running on that device may become accessible to the outside world. Any computer network that is connected to the internet is also potentially at risk for an attack. Without a firewall, these networks become vulnerable to malicious attacks. For example:
- If your network is connected to the internet, some types of malware find ways to divert portions of your hardware’s bandwidth for its own purposes.
- Some types of malware are designed to gain access to your network to use sensitive information such as credit card info, bank account numbers or other proprietary data like customer information.
Read more: importance of firewall in network security