OptionalallowOptionaldefaultDefault success-cache lifetime in milliseconds.
OptionallookupDNS implementation, injectable for deterministic tests.
OptionalmaxMaximum response size in bytes.
OptionalmaxMaximum cached documents; least recently used entries are evicted.
OptionalmaxMaximum tracked client IDs for rate limiting.
OptionalmaxUpper bound for origin-provided cache lifetimes in milliseconds.
OptionalrateMinimum time between resolution attempts for one client ID.
OptionaltimeoutPer request connect/read deadline in milliseconds.
Explicit development-only escape hatch for http:// loopback documents.