/**
 * Loopback host recognition.
 *
 * Lives in a leaf module because two unrelated faces need the same answer: the local
 * HTTP guard (is this request's Host/Origin the loopback interface?) and the
 * repo-config trust boundary (is this configured endpoint incapable of reaching the
 * network?). One implementation, so the two cannot disagree about what "local" means.
 */
/** Hostnames that denote the loopback interface (no DNS resolution involved). */
export declare const LOOPBACK_HOSTNAMES: Set<string>;
/** True if `host` is a loopback literal/name (127.0.0.0/8, ::1, localhost). */
export declare function isLoopbackHost(host: string): boolean;
//# sourceMappingURL=loopback.d.ts.map