A computer Network Firewall is either: (1) a software program installed on your PC (2) a built-in firewall inside your modem or (3) a dedicated hardware firewall. Firewalls generally block all traffic (data transfer) unless a specific rule exception is added to allow traffic to pass. Larger corporate networks generally use a dedicated hardware firewall. Dedicated appliances for a large amounts of traffic are also used. If you are more technically minded, you can set up a dedicated firewall … [Read more...]