Network Security for ISPs: DDoS, BGP Hygiene, and Readiness

Security is operational. The best controls are the ones you can run under stress at 2am. Here’s a practical starter pack.

September 09, 2025 • 9 min read • Security DDoS BGP IR
Cover for Network Security for ISPs: DDoS, BGP Hygiene, and Readiness
Note: This article is informational only. For official rules, always check authoritative sources and contracts.

DDoS basics

  • Know your bottleneck: transit, peering, core, edge, or customer last-mile.
  • Have a playbook: detect → classify → mitigate → communicate.

BGP hygiene

  • Publish and maintain ROAs where applicable; monitor route leaks.
  • Use prefix filters, max-prefix limits, and sane communities.

Incident readiness

  • Logging with retention, time sync, and a tested escalation tree.
  • Tabletop exercises: run at least quarterly.

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