diff --git a/.gitignore b/.gitignore
index 894a44c..dff0ef9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -102,3 +102,7 @@ venv.bak/
 
 # mypy
 .mypy_cache/
+
+# Self-project setting
+config.ini
+old_ip.txt
diff --git a/cf-dns-update.py b/cf-dns-update.py
new file mode 100644
index 0000000..e8bdae0
--- /dev/null
+++ b/cf-dns-update.py
@@ -0,0 +1,150 @@
+import configparser
+import json
+import urllib.error
+import urllib.parse
+import urllib.request
+from os import path
+
+
+def make_request(method="GET", url="", request_body=None):
+    headers = {
+        'Authorization': "Bearer {}".format(CF_API_TOKEN),
+        'Content-Type': 'application/json'
+    }
+
+    data = None
+    if request_body:
+        # data = urllib.parse.urlencode(request_body)
+        data = request_body.encode('ascii')
+
+    try:
+        req = urllib.request.Request(url, headers=headers, data=data, method=method)
+        with urllib.request.urlopen(req) as response:
+            resp_content = response.read()
+            return resp_content
+    except urllib.error.HTTPError as e:
+        print(e.code)
+        print(e.read())
+    except urllib.error.URLError as e:
+        print(e.reason)
+
+    return False
+
+
+def get_local_ip():
+    """
+    Get current public IP of server
+    :return: string
+    """
+    endpoint = "https://checkip.amazonaws.com/"
+
+    return make_request(url=endpoint).strip().decode('utf-8')
+
+
+def get_old_ip():
+    """
+
+    :return:
+    """
+    old_ip = None
+
+    if path.exists("old_ip.txt"):
+        with open('old_ip.txt', 'r') as fp:
+            old_ip = fp.read().strip()
+
+    return old_ip
+
+
+def save_old_ip(ip):
+    with open('old_ip.txt', 'w+') as fp:
+        fp.write(ip)
+
+
+def get_record_id(zone_id, record_name):
+    """
+    Get CloudFlare record id from domain/sub-domain name
+    :return:
+    """
+    endpoint = "https://api.cloudflare.com/client/v4/zones/{}/dns_records?name={}&type=A".format(
+        zone_id,
+        record_name
+    )
+    response = make_request("GET", endpoint)
+    data = json.loads(response)
+    if not data['success']:
+        return False
+
+    for record in data['result']:
+        if record['name'] == record_name:
+            return record['id']
+
+    return False
+
+
+def update_host(zone_id, record_name):
+    record_id = get_record_id(zone_id, record_name)
+
+    if not record_id:
+        return False
+
+    endpoint = "https://api.cloudflare.com/client/v4/zones/{}/dns_records/{}".format(
+        zone_id,
+        record_id
+    )
+
+    payload = {
+        "type": "A",
+        "name": record_name,
+        "content": public_ip
+    }
+
+    response = make_request(
+        method="PUT",
+        url=endpoint,
+        request_body=json.dumps(payload)
+    )
+    data = json.loads(response)
+
+    if not data['success']:
+        print("Failed to update {}:{}".format(record_name, public_ip))
+        return False
+
+    print("Success update {}:{}".format(record_name, public_ip))
+
+    return True
+
+
+config_file = 'config.ini'
+
+if not path.exists(config_file):
+    raise RuntimeError("config file not found")
+
+config = configparser.ConfigParser()
+config.read(config_file)
+
+if "common" not in config:
+    raise Exception("Common config not found.")
+
+if "CF_API_TOKEN" not in config['common'] or not config['common']['CF_API_TOKEN']:
+    raise Exception("Missing CloudFlare API Token on config file")
+
+CF_API_TOKEN = config['common']['CF_API_TOKEN']
+
+config_sections = config.sections()
+config_sections.remove("common")
+
+if not config_sections:
+    raise Exception("Empty site to update DNS")
+
+public_ip = get_local_ip()
+print("Public IP: {}".format(public_ip))
+if public_ip == get_old_ip():
+    print("Skip update")
+    exit()
+
+for domain in config_sections:
+    print("--- Updating {} ---".format(domain))
+    update_host(config[domain]['zone_id'], config[domain]['record'])
+
+print("Save old IP")
+save_old_ip(public_ip)
diff --git a/config.ini.sample b/config.ini.sample
new file mode 100644
index 0000000..e04b5c2
--- /dev/null
+++ b/config.ini.sample
@@ -0,0 +1,10 @@
+[common]
+CF_API_TOKEN = xxx
+
+[dungnt.net]
+zone_id = xxx
+record = test.dungnt.net
+
+[nhymxu.info]
+zone_id = xxx
+record = yyy.nhymxu.info
diff --git a/run.sh b/run.sh
new file mode 100755
index 0000000..33aca92
--- /dev/null
+++ b/run.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"
+
+if command -v python3 &>/dev/null; then
+    python3 cf-dns-update.py
+else
+    python cf-dns-update.py
+fi