NAT Firewalls and VPNs

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Network infrastructure fundamentals for security and connectivity. NAT (Network Address Translation) maps private IPs to public IPs. Firewalls filter traffic based on rules (iptables, security groups). VPNs create encrypted tunnels for secure remote access. WireGuard is a modern, fast VPN protocol.

Key Properties

• Network Address Translation
• Firewall Rules
• VPN Tunneling

Related

• Network Layer (NAT operates at the network layer)
• TLS Encryption (VPNs use encryption for tunneling)

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networking security infrastructure