A perimeter network is the boundary between the trusted and untrusted network. Lisa Bock discusses zone-based firewall configuration, where zones are created and a trust level is assigned on each interface according to how much you trust the traffic from that interface.
- [Instructor] When thinking about a network,…some areas are more trustworthy than others.…In a network we segment each part of the network…by logical zones where we can identify…the level of trust for each zone.…Firewalls inspect and filter traffic…according to a set of access control rules.…That either allow or deny certain types of traffics…between zones, when designing a network,…a perimeter network is the boundary between the trusted…and untrusted network.…
This allows an organization to deploy public services…such as email and web servers while isolating…the internal network and provides an additional layer…of protection, in this graphic we see a logical drawing…of the outside network or internet, the inside or LAN…and then we see in the center the demilitarized zone…or DMZ.…Isolation on a network occurs by configuring…a demilitarized zone, or screen subnet.…
Where the firewall filters traffic between the outside world…and the local area network.…We call it a screen subnet because it's a separate…subnetwork as we see from the IP address.…
Author
Lisa Bock
Released
9/21/2017- Security principles and terms
- SIEM technology
- Common security threats
- Social engineering
- Data loss prevention
- Cryptographic concepts
- Symmetric and asymmetric encryption
- Hash algorithms
- Network topologies, CAN, WAN, and SOHO
- Securing a virtual environment
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m 21s
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1. Security Principles
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Secure network overview5m 2s
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Security services4m 10s
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SIEM technology3m 44s
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Security terms3m 39s
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Security organizations4m 13s
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Network security domains4m 50s
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Zone defense3m 52s
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2. Common Security Threats
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Common network attacks7m 16s
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Identify malware5m 10s
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Data loss prevention4m 22s
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3. Cryptography
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Cryptographic concepts3m 58s
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Symmetric encryption5m 6s
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Asymmetric encryption4m 42s
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Hash algorithms4m 38s
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Key exchange3m 27s
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Public key infrastructure4m 21s
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4. Describe Network Topologies
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Campus area network2m 30s
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Cloud and wide area network2m 58s
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Data center3m 3s
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Conclusion
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Next steps1m 9s
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Video: Zone defense