Firewalls protect computers from network-based attacks by preventing hackers outside of the firewall from scanning computers for network vulnerabilities. A hardware-based network firewall protects the SF State network against attacks from outside of the firewall. However, viruses and worms can still be spread to other workstations via email and file transfers within the firewall. A network firewall does not control spyware, laptops brought to and from campus, or security problems originating from within the firewall.


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