/**
 * Check if an IP address is blocked based on CIDR ranges
 */
export declare function isIPBlocked(ipString: string, whitelistedIPs: string[]): boolean;
/**
 * Check if a string is an IP address
 */
export declare function isIPAddress(hostname: string): boolean;
/**
 * Check if hostname should be blocked based on patterns
 */
export declare function isHostnameBlocked(hostname: string): boolean;
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