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- Secures a computer network from hostile intrusions.
- Firewalls can monitor and record information. This can be of value in determining who is accessing what type of information.
- Firewalls can be used to complement or supplement content and email filtering solutions.
- Firewalls can automatically block most email viruses and malware attacks even before they start.
- Firewalls can be set up to allow access for certain users to access certain information but prevent others from doing so.
- Firewalls can also calculate usage of the internet, i.e. who spends most time using the internet and how this affects the performance of the network.
- Some firewalls can cause constraints or bottlenecks on the network as they concentrate security in one area.
- Organisations need to have a written policy or procedure that outlines what information can be accessed by employees and by whom. A firewall can be used to enforce these policies.