import type { SmartNftables } from './nft.manager.js';
import type { INftDnatRule, INftSnatRule, INftMasqueradeRule, TNftProtocol } from './nft.types.js';
/**
 * Manages NAT (DNAT/SNAT/masquerade) rules.
 */
export declare class NatManager {
    private parent;
    constructor(parent: SmartNftables);
    /**
     * Add a port forwarding rule (DNAT + optional masquerade).
     */
    addPortForwarding(groupId: string, rule: INftDnatRule): Promise<void>;
    /**
     * Remove a previously added port forwarding group.
     */
    removePortForwarding(groupId: string): Promise<void>;
    /**
     * Add SNAT (source NAT) rule.
     */
    addSnat(groupId: string, rule: INftSnatRule): Promise<void>;
    /**
     * Add masquerade rule for outgoing traffic.
     */
    addMasquerade(groupId: string, rule: INftMasqueradeRule): Promise<void>;
    /**
     * Add port forwarding for a range of ports.
     * Maps sourceStart..sourceStart+count to targetStart..targetStart+count.
     */
    addPortRange(groupId: string, sourceStart: number, sourceEnd: number, targetHost: string, targetStart: number, protocol?: TNftProtocol): Promise<void>;
    /**
     * Remove a port range forwarding group.
     */
    removePortRange(groupId: string): Promise<void>;
}