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Firewall, explained. Every port on your server is a door. With no rules, every one of them answers. A port scanner knocks on all of them until something replies, and that reply is how an attacker maps your machine. A firewall checks each door number against your rules. ALLOW 443, ALLOW 80, deny the rest. Port 3306, your database, should never have been reachable in the first place. The part people miss: a blocked packet is dropped, not refused. No reply at all. The scanner hears silence, so it c
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Firewall, explained. Every port on your server is a door. With no rules, every one of them answers. A port scanner knocks on all of them until something replies, and that reply is how an attacker maps your machine. A firewall checks each door number against your rules. ALLOW 443, ALLOW 80, deny the rest. Port 3306, your database, should never have been reachable in the first place. The part people miss: a blocked packet is dropped, not refused. No reply at all. The scanner hears silence, so it c
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Don't lose easy points on network architecture questions! Where should a public-facing web server sit in a dual-firewall network architecture? Test your CompTIA Security knowledge on screened subnets and drop your answer in the comments! Prep smarter with Easy Prep. #SecurityPlus #CompTIASecurityPlus #DMZ #ScreenedSubnet #SecPlus
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Your Firewall Rule Says an IP. Users Move.
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