IP Blocks

Blacklist an IPv6 subnet

Since 7.1.0
POST/connectivity/ipblocks/{blockId}/blacklist

Keep one subnet of an IPv6 block out of generation and allocation. Any address inside the subnet may be sent.

Request

Authorization
Provide your bearer token in the Authorization header when making requests to protected resources.
Example: Authorization: Bearer ********************
Path Params#
blockIdinteger#required

A valid IP block ID as shown in VirtFusion.

Example: 1
Body Paramsapplication/json#

The subnet.

object
subnetstring#required

An address inside the subnet to blacklist.

Example
{
    "subnet": "2001:db8:1:5::"
}

Request Code Samples

curl --location --request POST 'https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist' \
--header 'Authorization: Bearer <token>' \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data-raw '{
    "subnet": "2001:db8:1:5::"
}'
wget --quiet --output-document=- \
  --method=POST \
  --header='Authorization: Bearer <token>' \
  --header='Accept: application/json' \
  --header='Content-Type: application/json' \
  --body-data='{
    "subnet": "2001:db8:1:5::"
}' \
  'https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist'
http POST 'https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist' \
  'Authorization: Bearer <token>' \
  'Accept: application/json' \
  'Content-Type: application/json' <<< '{
    "subnet": "2001:db8:1:5::"
}'
const response = await fetch("https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist", {
    method: "POST",
    headers: {
        "Authorization": "Bearer <token>",
        "Accept": "application/json",
        "Content-Type": "application/json",
    },
    body: JSON.stringify({
        "subnet": "2001:db8:1:5::"
    }),
});

const data = await response.json();
console.log(response.status, data);
import axios from "axios";

const response = await axios({
    method: "post",
    url: "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist",
    headers: {
        "Authorization": "Bearer <token>",
        "Accept": "application/json",
        "Content-Type": "application/json",
    },
    data: {
        "subnet": "2001:db8:1:5::"
    },
});

console.log(response.status, response.data);
const https = require("https");

const payload = JSON.stringify({
    "subnet": "2001:db8:1:5::"
});

const req = https.request({
    hostname: "cp.domain.com",
    path: "/api/v1/connectivity/ipblocks/1/blacklist",
    method: "POST",
    headers: {
        "Authorization": "Bearer <token>",
        "Accept": "application/json",
        "Content-Type": "application/json",
        "Content-Length": Buffer.byteLength(payload),
    },
}, (res) => {
    let data = "";
    res.on("data", (chunk) => (data += chunk));
    res.on("end", () => console.log(res.statusCode, JSON.parse(data)));
});

req.on("error", (err) => console.error(err));
req.write(payload);
req.end();
import requests

url = "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist"
headers = {
    "Authorization": "Bearer <token>",
    "Accept": "application/json",
    "Content-Type": "application/json",
}
payload = {
    "subnet": "2001:db8:1:5::",
}

response = requests.request("POST", url, headers=headers, json=payload)

print(response.status_code)
print(response.json())
import http.client
import json

conn = http.client.HTTPSConnection("cp.domain.com")
headers = {
    "Authorization": "Bearer <token>",
    "Accept": "application/json",
    "Content-Type": "application/json",
}
payload = json.dumps({
    "subnet": "2001:db8:1:5::",
})

conn.request("POST", "/api/v1/connectivity/ipblocks/1/blacklist", payload, headers)
response = conn.getresponse()

print(response.status)
print(json.loads(response.read()))
<?php

$curl = curl_init();

curl_setopt_array($curl, array(
    CURLOPT_URL => 'https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => '',
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 0,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_POSTFIELDS => json_encode([
        'subnet' => '2001:db8:1:5::',
    ]),
    CURLOPT_HTTPHEADER => array(
        'Authorization: Bearer <token>',
        'Accept: application/json',
        'Content-Type: application/json'
    ),
));

$response = curl_exec($curl);
curl_close($curl);

echo $response;
<?php

require 'vendor/autoload.php';

use GuzzleHttp\Client;

$client = new Client();

$response = $client->request('POST', 'https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist', [
    'headers' => [
        'Authorization' => 'Bearer <token>',
        'Accept' => 'application/json',
    ],
    'json' => [
        'subnet' => '2001:db8:1:5::',
    ],
]);

echo $response->getStatusCode() . "\n";
echo $response->getBody();
package main

import (
    "fmt"
    "io"
    "net/http"
    "strings"
)

func main() {
    url := "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist"
    payload := strings.NewReader(`{
    "subnet": "2001:db8:1:5::"
}`)
    req, _ := http.NewRequest("POST", url, payload)
    req.Header.Add("Authorization", "Bearer <token>")
    req.Header.Add("Accept", "application/json")
    req.Header.Add("Content-Type", "application/json")

    res, err := http.DefaultClient.Do(req)
    if err != nil {
        panic(err)
    }
    defer res.Body.Close()

    body, _ := io.ReadAll(res.Body)
    fmt.Println(res.StatusCode, string(body))
}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        HttpClient client = HttpClient.newHttpClient();

        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist"))
            .header("Authorization", "Bearer <token>")
            .header("Accept", "application/json")
            .header("Content-Type", "application/json")
            .method("POST", HttpRequest.BodyPublishers.ofString("{\"subnet\":\"2001:db8:1:5::\"}"))
            .build();

        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.statusCode());
        System.out.println(response.body());
    }
}
import okhttp3.*;

public class Main {
    public static void main(String[] args) throws Exception {
        OkHttpClient client = new OkHttpClient();

        MediaType json = MediaType.get("application/json");
        RequestBody body = RequestBody.create("{\"subnet\":\"2001:db8:1:5::\"}", json);

        Request request = new Request.Builder()
            .url("https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist")
            .method("POST", body)
            .addHeader("Authorization", "Bearer <token>")
            .addHeader("Accept", "application/json")
            .build();

        try (Response response = client.newCall(request).execute()) {
            System.out.println(response.code());
            System.out.println(response.body().string());
        }
    }
}
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;

var client = new HttpClient();
var request = new HttpRequestMessage(new HttpMethod("POST"), "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist");
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "<token>");
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
request.Content = new StringContent("{\"subnet\":\"2001:db8:1:5::\"}", Encoding.UTF8, "application/json");

var response = await client.SendAsync(request);
Console.WriteLine((int)response.StatusCode);
Console.WriteLine(await response.Content.ReadAsStringAsync());
require "net/http"
require "json"

uri = URI("https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist")
request = Net::HTTP::Post.new(uri)
request["Authorization"] = "Bearer <token>"
request["Accept"] = "application/json"
request["Content-Type"] = "application/json"
request.body = "{\"subnet\":\"2001:db8:1:5::\"}"

response = Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts response.code
puts JSON.pretty_generate(JSON.parse(response.body))
import Foundation

var request = URLRequest(url: URL(string: "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist")!)
request.httpMethod = "POST"
request.setValue("Bearer <token>", forHTTPHeaderField: "Authorization")
request.setValue("application/json", forHTTPHeaderField: "Accept")
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
request.httpBody = "{\"subnet\":\"2001:db8:1:5::\"}".data(using: .utf8)

let task = URLSession.shared.dataTask(with: request) { data, response, error in
    guard let data = data, error == nil else { print(error ?? "request failed"); return }
    print((response as! HTTPURLResponse).statusCode)
    print(String(data: data, encoding: .utf8) ?? "")
}
task.resume()
// Cargo.toml: reqwest = { version = "0.12", features = ["blocking", "json"] }, serde_json = "1"
use reqwest::blocking::Client;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    let response = client
        .request(reqwest::Method::POST, "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist")
        .bearer_auth("<token>")
        .header("Accept", "application/json")
        .header("Content-Type", "application/json")
        .body(r#"{
    "subnet": "2001:db8:1:5::"
}"#)
        .send()?;

    println!("{}", response.status());
    let json: serde_json::Value = response.json()?;
    println!("{}", serde_json::to_string_pretty(&json)?);
    Ok(())
}
// Cargo.toml: reqwest = { version = "0.12", features = ["json"] }, tokio = { version = "1", features = ["full"] }, serde_json = "1"
use reqwest::Client;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    let response = client
        .request(reqwest::Method::POST, "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist")
        .bearer_auth("<token>")
        .header("Accept", "application/json")
        .header("Content-Type", "application/json")
        .body(r#"{
    "subnet": "2001:db8:1:5::"
}"#)
        .send()
        .await?;

    println!("{}", response.status());
    let json: serde_json::Value = response.json().await?;
    println!("{}", serde_json::to_string_pretty(&json)?);
    Ok(())
}
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.RequestBody.Companion.toRequestBody

fun main() {
    val client = OkHttpClient()
    val body = """{
    "subnet": "2001:db8:1:5::"
}""".toRequestBody("application/json".toMediaType())
    val request = Request.Builder()
        .url("https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist")
        .method("POST", body)
        .addHeader("Authorization", "Bearer <token>")
        .addHeader("Accept", "application/json")
        .build()

    client.newCall(request).execute().use { response ->
        println(response.code)
        println(response.body?.string())
    }
}
// pubspec.yaml: http: ^1.2.0
import 'dart:convert';
import 'package:http/http.dart' as http;

Future<void> main() async {
  final request = http.Request('POST', Uri.parse('https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist'));
  request.headers['Authorization'] = 'Bearer <token>';
  request.headers['Accept'] = 'application/json';
  request.headers['Content-Type'] = 'application/json';
  request.body = r'''{
    "subnet": "2001:db8:1:5::"
}''';

  final response = await http.Response.fromStream(await request.send());
  print(response.statusCode);
  print(const JsonEncoder.withIndent('  ').convert(jsonDecode(response.body)));
}
#include <stdio.h>
#include <curl/curl.h>

int main(void) {
    CURL *curl = curl_easy_init();
    if (!curl) return 1;

    struct curl_slist *headers = NULL;
    headers = curl_slist_append(headers, "Authorization: Bearer <token>");
    headers = curl_slist_append(headers, "Accept: application/json");
    headers = curl_slist_append(headers, "Content-Type: application/json");

    curl_easy_setopt(curl, CURLOPT_URL, "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist");
    curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "{\"subnet\":\"2001:db8:1:5::\"}");

    CURLcode result = curl_easy_perform(curl);
    if (result != CURLE_OK) fprintf(stderr, "%s\n", curl_easy_strerror(result));

    curl_slist_free_all(headers);
    curl_easy_cleanup(curl);
    return result == CURLE_OK ? 0 : 1;
}
$headers = @{
    Authorization = "Bearer <token>"
    Accept        = "application/json"
}

$body = @'
{
    "subnet": "2001:db8:1:5::"
}
'@

$response = Invoke-RestMethod -Uri "https://cp.domain.com/api/v1/connectivity/ipblocks/1/blacklist" -Method POST -Headers $headers -ContentType "application/json" -Body $body
$response | ConvertTo-Json -Depth 10
POST /api/v1/connectivity/ipblocks/1/blacklist HTTP/1.1
Host: cp.domain.com
Authorization: Bearer <token>
Accept: application/json
Content-Type: application/json
Content-Length: 34

{
    "subnet": "2001:db8:1:5::"
}

Responses

201

Added.

#
application/json
object

A subnet kept out of generation and allocation.

IPBlockBlacklistEntry fields
idinteger#
subnetstring#
createdstring <date-time>#nullable
Example
{
    "data": {
        "id": 14,
        "subnet": "2001:db8:1:5::",
        "created": "2026-10-06T15:02:11+00:00"
    }
}
401

The bearer token is missing, invalid, or expired. The response has no body.

#
No response body.
404

The IP block was not found.

#
application/json
msgstring#
Example
{
    "msg": "ip block not found"
}
409

The block is an IPv4 block, is not configured yet, the subnet is in use, or another cha…

#
application/json

The block is an IPv4 block, is not configured yet, the subnet is in use, or another change to the block is in progress.

errorsarray[string]#
Example
{
    "errors": [
        "the blacklist applies to IPv6 blocks"
    ]
}
422

Validation failed or an unknown field was sent. Nothing was written.

#
application/json
errorsobject#
Example
{
    "errors": {
        "subnet": [
            "must be inside the blocks source prefix"
        ]
    }
}
429

Too many requests. Either the token's requests per minute are used up (see the `X-RateL…

#
application/json

Too many requests. Either the token's requests per minute are used up (see the X-RateLimit-* headers) or the calling address has failed authentication 10 times in a minute (the body then includes retry_after_seconds). Retry-After gives the seconds to wait.

object
errorsarray[string]#
retry_after_secondsinteger#

Seconds to wait before retrying. Present on the failed-authentication limit only.

Response headers
Retry-Afterinteger

Seconds to wait before retrying.

X-RateLimit-Limitinteger

The token's requests per minute (token limit only).

X-RateLimit-Remaininginteger

Requests left in the current minute (token limit only).

X-RateLimit-Resetinteger

Unix timestamp at which the minute resets (token limit only).

Examples
{
    "errors": [
        "Too Many Requests"
    ]
}
{
    "errors": [
        "Too many authentication attempts. Try again later."
    ],
    "retry_after_seconds": 42
}