Firewalls protect computers by blocking unauthorized access while allowing safe traffic, but poor configuration can slow performance or leave vulnerabilities. Default settings may not suit unique needs (e.g., gamers, remote workers), requiring tweaks for balance. 
 
Firewalls are like the "Armor of God" (Ephesians 6:10-17), where six spiritual elements work together, like a firewall, to shield believers from threats if actively used daily.

Ephesians 6:18 - "Pray in the Spirit at all times and on every occasion. Stay alert and be persistent in your prayers for all believers everywhere."

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