Cloudflare ??????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????? ??????? ?????????????? ???????????????????????????? DDoS attacks, bots ??????????????????????????? ?????????????? bot ??????????????????? workflow ?????????????????????????????????????? ????????? ???????????????????????????????

??????????? ????????????? Cloudflare ???????????? ??????????????? bot ?????????????????????????????????????? bypass ???????????????????????????????????????????????? 2025

Cloudflare ????????

Cloudflare ??????????? Content Delivery Network (CDN) ???????????????????????????????????????????????????????????????????? latency ?????????????????????????? ???????????????:

• DDoS protection
• Web Application Firewall (WAF)
• Bot management
• DNS services
• Anti-bot and CAPTCHA protection

WAF ??? Cloudflare ?????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????? ????????????????????????????? workflow ????????????????

???????????????????????????????? Cloudflare

????????????????? Cloudflare ???????????????????????????????????????:

1. TLS Fingerprints – ?????????????? client ?? TLS handshake ??? client ????????????????????????? signature ??????????
2. HTTP Request Analysis – ??????? headers, cookies ???????? user-agent ???????????????????????????????????????????
3. JavaScript Fingerprints – ??? JS ???????????????? client ???????????? OS, fonts, extensions ?????????????????
4. Behavioral Analysis – ?????????????????????????????? ??????????????????????????? ????????????? ??????????????????

Cloudflare ???????????????????????????????????:

• Always Show Human Verification – ??????? CAPTCHA ????????????????????????????????? (?????????????????? StackOverflow)
• Automated Human Verification – ?????????????????????????????????????? JS ????????????? ?????升級?????????? CAPTCHA ????????????????????????

Cloudflare ????? behind the scenes ???????

????????????????????????????????????????????? Cloudflare:

1. Client ???????????? encrypted POST requests ????????????????? Cloudflare
2. Cloudflare ????????? fingerprint ?????????????????????
3. ?????????????????? ????????????????? cf_clearance ???????????????????????????????? 15 ???

?????????????????? HTTP client ??????????? requests ????????????????????? 403 Forbidden ?????????????? automation ??????????????? Playwright ??????????????????????????? ?????????????????????????????????????????? bypass CAPTCHAs

??????? Bypass Cloudflare

1. Direct Server IP Access

??? bypass Cloudflare ??????????????????????????? IP ?????????????????????????????????????? DNS ????????: ????????????????????????????????? IP ??? Cloudflare ???????? ??????????????????????????

2. Open-Source Solvers

??????????? cloudscraper, cfscrape ??? humanoid ??????????? challenge ??? Cloudflare ???????:

• ?????????????
• ???????????? Cloudflare ??????????
• ??????????????????????? (scalability) ?????

3. Automation Tools with Bypass Capabilities

??????????????????????????????????????????????? automation ????????????????:Bitbrowser

• Render JavaScript challenges
• Spoof browser fingerprints
• Solve CAPTCHAs automatically
• Simulate human interactions
• Rotate proxies for IP diversity

???????????????? ?????? Bright Data’s Web Unlocker ??? Browser API

Python Solutions ????????? Bypass Cloudflare

Camoufox (Open-Source)

??????????? anti-detect ??? Python ?????????? Playwright ????????? Turnstile CAPTCHAs ??? automation ??????????????

from camoufox.sync_api import Camoufox
from playwright.sync_api import TimeoutError
with Camoufox(headless=False, humanize=True, window=(1280, 720)) as browser:
    page = browser.new_page()
    page.goto("https://www.scrapingcourse.com/cloudflare-challenge")
    page.mouse.click(210, 290)  # Click Turnstile
    try:
        page.locator("text=You bypassed the Cloudflare challenge! :D").wait_for()
        success = True
    except TimeoutError:
        success = False
    browser.close()
print("Cloudflare Bypassed:", success)

SeleniumBase

????????????? Python ??????????????????? undetected-chromedriver ????????? bypass Cloudflare ?????????:

from seleniumbase import Driver
driver = Driver(uc=True)
driver.uc_open_with_reconnect("https://www.scrapingcourse.com/cloudflare-challenge", 4)
driver.uc_gui_click_captcha()
driver.wait_for_text("You bypassed the Cloudflare challenge! :D", "main")
driver.quit()

Scaling ??? Bypass Cloudflare

??????? open-source ????????????????????? production ?????????:

• ??????????????????? headless browsers
• ??????????????????????????
• ?????????????????????????????

???????????????:

• Web Unlocker – ??? HTML ???????????????? anti-bot ?????? rate limits, fingerprints ??? CAPTCHAs
• Browser API – Automation ??????????????????? ?????????? Playwright, Puppeteer, Selenium ??????? IP ?????????

?????? Web Unlocker

import requests
BRIGHT_DATA_API_KEY = "<YOUR_API_KEY>"
headers = {"Authorization": f"Bearer {BRIGHT_DATA_API_KEY}", "Content-Type": "application/json"}
data = {"zone": "web_unlocker", "url": "https://www.scrapingcourse.com/cloudflare-challenge", "format": "raw"}
response = requests.post("https://api.brightdata.com/request", json=data, headers=headers)
html = response.text
print("Cloudflare Bypassed:", "You bypassed the Cloudflare challenge! :D" in html)

?????? Browser API

from playwright.sync_api import sync_playwright, TimeoutError
BRIGHT_DATA_API_CDP_URL = "<YOUR_CDP_URL>"
with sync_playwright() as p:
    browser = p.chromium.connect_over_cdp(BRIGHT_DATA_API_CDP_URL)
    page = browser.new_page()
    page.goto("https://www.scrapingcourse.com/cloudflare-challenge")
    try:
        page.locator("text=You bypassed the Cloudflare challenge! :D").wait_for()
        success = True
    except TimeoutError:
        success = False
    browser.close()
print("Cloudflare Bypassed:", success)

????

??? bypass Cloudflare ????????????????????????? ?????????? open-source ?????????????????????????????? ???????? ??????????????? ????? Web Unlocker ??? Browser API ?????????????????????????? (scalability), ??????????????? ?????????????? ?????????????? automation ??? Python ?????????????????? ?????????????????????? Cloudflare ??????????????????????????????????????????????? automation ???? 2025