Network Security Checklist

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- J.D. Meier, Alex Mackman, Michael Dunner, Srinath Vasireddy, Ray Escamilla and Anandha Murukan


Router Considerations

  • Latest patches and updates are installed.
  • You subscribed to router vendor's security notification service.
  • Known vulnerable ports are blocked.
  • Ingress and egress filtering is enabled. Incoming and outgoing packets are confirmed as coming from public or internal networks.
  • ICMP traffic is screened from the internal network.
  • Administration interfaces to the router are enumerated and secured.
  • Web-facing administration is disabled.
  • Directed broadcast traffic is not received or forwarded.
  • Unused services are disabled (for example, TFTP).
  • Strong passwords are used.
  • Logging is enabled and audited for unusual traffic or patterns.
  • Large ping packets are screened.
  • Routing Information Protocol (RIP) packets, if used, are blocked at the outermost router.

Firewall Considerations

  • Latest patches and updates are installed.
  • Effective filters are in place to prevent malicious traffic from entering the perimeter
  • Unused ports are blocked by default.
  • Unused protocols are blocked by default.
  • IPsec is configured for encrypted communication within the perimeter network.
  • Intrusion detection is enabled at the firewall.

Switch Considerations

  • Latest patches and updates are installed.
  • Administrative interfaces are enumerated and secured.
  • Unused administrative interfaces are disabled.
  • Unused services are disabled.
  • Available services are secured.


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