import * as pulumi from "@pulumi/pulumi";
/**
 * Attaches resource to a Hetzner Cloud Firewall.
 *
 * _Note_: only one `hcloud.FirewallAttachment` per Firewall is allowed.
 * Any resources that should be attached to that Firewall need to be
 * specified in that `hcloud.FirewallAttachment`.
 *
 * ## Example Usage
 *
 * ### Attach Servers
 *
 * ```typescript
 * import * as pulumi from "@pulumi/pulumi";
 * import * as hcloud from "@pulumi/hcloud";
 *
 * const testServer = new hcloud.Server("test_server", {
 *     name: "test-server",
 *     serverType: "cx23",
 *     image: "ubuntu-24.04",
 * });
 * const basicFirewall = new hcloud.Firewall("basic_firewall", {name: "basic_firewall"});
 * const fwRef = new hcloud.FirewallAttachment("fw_ref", {
 *     firewallId: basicFirewall.id,
 *     serverIds: [testServer.id],
 * });
 * ```
 *
 * ### Attach Label Selectors
 *
 * ```typescript
 * import * as pulumi from "@pulumi/pulumi";
 * import * as hcloud from "@pulumi/hcloud";
 *
 * const testServer = new hcloud.Server("test_server", {
 *     name: "test-server",
 *     serverType: "cx23",
 *     image: "ubuntu-24.04",
 *     labels: {
 *         "firewall-attachment": "test-server",
 *     },
 * });
 * const basicFirewall = new hcloud.Firewall("basic_firewall", {name: "basic_firewall"});
 * const fwRef = new hcloud.FirewallAttachment("fw_ref", {
 *     firewallId: basicFirewall.id,
 *     labelSelectors: ["firewall-attachment=test-server"],
 * });
 * ```
 *
 * ### Ensure a server is attached to a Firewall on first boot
 *
 * The `firewallIds` property of the `hcloud.Server` resource ensures that
 * a server is attached to the specified Firewalls before its first boot.
 * This is **not** the case when using the `hcloud.FirewallAttachment`
 * resource to attach servers to a Firewall. In some scenarios this may
 * pose a security risk.
 *
 * The following workaround ensures that a server is attached to a Firewall
 * _before_ it first boots. However, the workaround requires two Firewalls.
 * Additionally the server resource definition needs to ignore any remote
 * changes to the `hcloud_server.firewall_ids` property. This is done using
 * the `ignoreRemoteFirewallIds` property of `hcloud.Server`.
 *
 * ```typescript
 * import * as pulumi from "@pulumi/pulumi";
 * import * as hcloud from "@pulumi/hcloud";
 * import * as std from "@pulumi/std";
 *
 * const denyAll = new hcloud.Firewall("deny_all", {name: "deny_all"});
 * const testServer = new hcloud.Server("test_server", {
 *     name: "test-server",
 *     serverType: "cx23",
 *     image: "ubuntu-24.04",
 *     ignoreRemoteFirewallIds: true,
 *     firewallIds: [denyAll.id],
 * });
 * const allowRules = new hcloud.Firewall("allow_rules", {
 *     name: "allow_rules",
 *     rules: [{
 *         direction: "in",
 *         protocol: "tcp",
 *         port: "22",
 *         sourceIps: [
 *             "0.0.0.0/0",
 *             "::/0",
 *         ],
 *         destinationIps: [std.format({
 *             input: "%s/32",
 *             args: [testServer.ipv4Address],
 *         }).then(invoke => invoke.result)],
 *     }],
 * });
 * const denyAllAtt = new hcloud.FirewallAttachment("deny_all_att", {
 *     firewallId: denyAll.id,
 *     serverIds: [testServer.id],
 * });
 * const allowRulesAtt = new hcloud.FirewallAttachment("allow_rules_att", {
 *     firewallId: allowRules.id,
 *     serverIds: [testServer.id],
 * });
 * ```
 *
 * ## Import
 *
 * Firewall Attachments can be imported using the `id` of the firewall:
 *
 * ```sh
 * $ pulumi import hcloud:index/firewallAttachment:FirewallAttachment example "$FIREWALL_ID"
 * ```
 */
export declare class FirewallAttachment extends pulumi.CustomResource {
    /**
     * Get an existing FirewallAttachment resource's state with the given name, ID, and optional extra
     * properties used to qualify the lookup.
     *
     * @param name The _unique_ name of the resulting resource.
     * @param id The _unique_ provider ID of the resource to lookup.
     * @param state Any extra arguments used during the lookup.
     * @param opts Optional settings to control the behavior of the CustomResource.
     */
    static get(name: string, id: pulumi.Input<pulumi.ID>, state?: FirewallAttachmentState, opts?: pulumi.CustomResourceOptions): FirewallAttachment;
    /**
     * Returns true if the given object is an instance of FirewallAttachment.  This is designed to work even
     * when multiple copies of the Pulumi SDK have been loaded into the same process.
     */
    static isInstance(obj: any): obj is FirewallAttachment;
    /**
     * ID of the firewall the resources
     * should be attached to.
     */
    readonly firewallId: pulumi.Output<number>;
    /**
     * List of label selectors used to
     * select resources to attach to the firewall.
     */
    readonly labelSelectors: pulumi.Output<string[] | undefined>;
    /**
     * List of Server IDs to attach to the
     * firewall.
     */
    readonly serverIds: pulumi.Output<number[] | undefined>;
    /**
     * Create a FirewallAttachment resource with the given unique name, arguments, and options.
     *
     * @param name The _unique_ name of the resource.
     * @param args The arguments to use to populate this resource's properties.
     * @param opts A bag of options that control this resource's behavior.
     */
    constructor(name: string, args: FirewallAttachmentArgs, opts?: pulumi.CustomResourceOptions);
}
/**
 * Input properties used for looking up and filtering FirewallAttachment resources.
 */
export interface FirewallAttachmentState {
    /**
     * ID of the firewall the resources
     * should be attached to.
     */
    firewallId?: pulumi.Input<number>;
    /**
     * List of label selectors used to
     * select resources to attach to the firewall.
     */
    labelSelectors?: pulumi.Input<pulumi.Input<string>[]>;
    /**
     * List of Server IDs to attach to the
     * firewall.
     */
    serverIds?: pulumi.Input<pulumi.Input<number>[]>;
}
/**
 * The set of arguments for constructing a FirewallAttachment resource.
 */
export interface FirewallAttachmentArgs {
    /**
     * ID of the firewall the resources
     * should be attached to.
     */
    firewallId: pulumi.Input<number>;
    /**
     * List of label selectors used to
     * select resources to attach to the firewall.
     */
    labelSelectors?: pulumi.Input<pulumi.Input<string>[]>;
    /**
     * List of Server IDs to attach to the
     * firewall.
     */
    serverIds?: pulumi.Input<pulumi.Input<number>[]>;
}