Individual skill
implementing-network-access-control
Implements 802.1X port-based network access control using RADIUS authentication, PacketFence NAC, and switch configurations to enforce identity-based access policies, posture assessment, and automatic VLAN assignment for authorized devices.
internal/tools/skills/data/network-security/implementing-network-access-control/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
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- Network or broad shell
- Last checked
- Nov 9, 2026
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- 1,317
- Repository last updated
- Nov 8, 2026
- License
- Apache-2.0
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- network-security Declared skill tag
- nac Declared skill tag
- 802.1x Declared skill tag
- radius Declared skill tag
- packetfence Declared skill tag
- security Derived category
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# Implementing Network Access Control
## When to Use
- Enforcing identity-based network access where only authenticated and compliant devices connect to the network
- Implementing zero-trust networking at the access layer with dynamic VLAN assignment based on user role
- Quarantining non-compliant devices that fail endpoint posture checks (missing patches, disabled AV)
- Meeting compliance requirements (PCI-DSS, HIPAA, SOC 2) for network access controls
- Onboarding BYOD devices with automated provisioning and limited network access
**Do not use** as a standalone security solution without complementary controls, for networks with devices that do not support 802.1X supplicants, or without proper fallback mechanisms for critical infrastructure.
## Common Misconfigurations & Verification
- **No critical-VLAN fallback = outage or open:** without `authentication event server dead action authorize vlan <x>`, a FreeRADIUS outage drops every new device off the network (or, with open auth, lets them all on). Configure and test the dead-server path explicitly.