Networking

High Availability (HA) Pair

Two appliances or servers configured so that one actively serves traffic on a shared virtual address while the other stands by and takes over on failure. HA protects against independent hardware or software faults, not against attacks that crash both nodes the same way.

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How to Keep a Crash-Loop Exploit From Taking Down Both Nodes of an HA Pair

Failover does not help when the attacker crashes the service on demand. A runbook for stopping the trigger, preserving evidence, and patching an HA pair in the right order.

intermediate 6 min read

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