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标签：Network Security

Check Point Gaia CLI: Expert Mode, Backup and Restore

Check Point Gaia CLI: Expert Mode, Backup and Restore

Work in Check Point Gaia OS: clish versus Expert mode, safe configuration backup and restore with add backup and set backup restore, and save config d

admin admin 2026-09-28
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Cisco IOS Zone-Based Firewall: Zones, Zone Pairs, Inspect

Cisco IOS Zone-Based Firewall: Zones, Zone Pairs, Inspect

Configure Cisco IOS zone-based policy firewall: security zones, zone pairs, class-maps and inspect policy-maps, plus verification with show zone-pair

admin admin 2026-09-28
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AWS Transit Gateway: Attachments and Route Tables

AWS Transit Gateway: Attachments and Route Tables

Design AWS Transit Gateway correctly: attachment subnets, propagate versus static routes, segmentation with multiple TGW route tables and shared VPCs.

admin admin 2026-09-27
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PowerDNS Authoritative Server with dnsdist

PowerDNS Authoritative Server with dnsdist

Deploy PowerDNS with a database backend and dnsdist in front: schema setup, zone management, DNSSEC, caching, rate limiting and query-log analysis.

admin admin 2026-09-26
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Istio Service Mesh: mTLS and Traffic Shifting

Istio Service Mesh: mTLS and Traffic Shifting

How Istio sidecars give you automatic mTLS, identity-aware policy and canary traffic splitting, plus the commands that prove the mesh is actually work

admin admin 2026-09-26
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FreeRADIUS EAP-TLS for Wired 802.1X with Cisco Switches

FreeRADIUS EAP-TLS for Wired 802.1X with Cisco Switches

Deploy FreeRADIUS with EAP-TLS for wired 802.1X on Cisco switches: certificates, clients.conf, the eap module, AAA configuration and verification.

admin admin 2026-09-25
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DHCP Option 82 and IP Source Guard on Access Ports

DHCP Option 82 and IP Source Guard on Access Ports

Lock down an access layer with DHCP snooping, option 82 insertion and IP source guard: the binding table, port trust rules, and the order that avoids

admin admin 2026-09-24
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Control Plane Policing (CoPP): Protecting the CPU

Control Plane Policing (CoPP): Protecting the CPU

Configure CoPP so a flood of ARP, ICMP or routing packets cannot take down a switch: class maps, policy maps, default policies and safe tuning rules.

admin admin 2026-09-24
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IPv6 First Hop Security: RA Guard and DHCPv6 Guard

IPv6 First Hop Security: RA Guard and DHCPv6 Guard

Stop rogue IPv6 routers and DHCPv6 servers on your access layer with RA Guard, DHCPv6 Guard, IPv6 snooping and source guard, configured on Cisco Catal

admin admin 2026-09-24
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WPA3-Enterprise 802.1X Wireless RADIUS Configuration

WPA3-Enterprise 802.1X Wireless RADIUS Configuration

Deploy WPA3-Enterprise on wireless: 802.1X with RADIUS prerequisites, transition versus WPA3-only mode, PMF requirements and a working AOS example.

admin admin 2026-09-22
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