Suddenly unable to bypass CloudFlare challenge (Ubuntu Server)

[Jobine23]

Hello, overnight my instances of seleniumbase became unable to bypass the CloudFlare challenge ( which uses CloudFlare turnstile ).

I was using an older version of SB so I updated to latest ( 4.27.4 ), and it is still not passing the challenge.

I am using your demo code for clicking on the CloudFlare turnstile captcha:

from seleniumbase import SB

def open_the_turnstile_page(sb):
    url = "https://wildbet.gg/"
    sb.driver.uc_open_with_reconnect(url, reconnect_time=5)

def click_turnstile_and_verify(sb):
    sb.switch_to_frame("iframe")
    sb.driver.uc_click("span")
    sb.assert_element("img#captcha-success", timeout=3)

with SB(uc=True, test=True) as sb:
    open_the_turnstile_page(sb)
    try:
        click_turnstile_and_verify(sb)
    except Exception:
        open_the_turnstile_page(sb)
        click_turnstile_and_verify(sb)
    sb.set_messenger_theme(location="top_left")
    sb.post_message("SeleniumBase wasn't detected", duration=3)

if I instead use:
sb.driver.uc_open_with_reconnect(url, reconnect_time=9999)

and click manually, it works. This means they are detecting something ?

I also tried adding reconnect_time=5 on uc_click and it did not help.

I'm a big fan of your project and I've been using it for some time :)

[mdmintz]

Just tested on seleniumbase 4.27.5, and the following script is working for me:

from seleniumbase import SB

with SB(uc=True, test=True) as sb:
    url = "https://wildbet.gg/"
    sb.driver.uc_open_with_reconnect(url, 10)

If you're still getting blocked, it might be that you exceeded a rate limit for your IP Address.

[Jobine23]

Thank you for your reply. I am not sure to understand. Why would it be related to any kind of ratelimiting if I can edit the code to disconnect permanently then click myself so that it goes through ? The only difference between error and success is that I click manually.

[mdmintz]

You can try that if it helps. When I ran the UC Mode script for that page, the script never had to click anything to bypass the CAPTCHA.

[JimKarvo]

We have the same problem at headless systems -ubuntu server-. 2 different servers, the ip is rotated - whitelisted

[vmolostvov]

@mdmintz same problem here on linux vds (ubuntu without gpu), seleniumbase became unable to bypass the CloudFlare challenge. Using latest sb version. On local macos and windows keep working without any problem.

[vmolostvov]

We have the same problem at headless systems -ubuntu server-. 2 different servers, the ip is rotated - whitelisted

did you find any solution sir?

[JimKarvo]

We have the same problem at headless systems -ubuntu server-. 2 different servers, the ip is rotated - whitelisted

did you find any solution sir?

Not yet, waiting if @mdmintz has any suggestions

[mdmintz]

OK, sounds like something has changed because there are a few different people showing up here. And this also sounds like this is specific to Linux because everything is working normally on macOS and Windows for me.

I'm still going to need more details to assist:

• What version of Linux are you using?
• What version of SeleniumBase are you using?
• Does it still work on an earlier version of SeleniumBase, and if so, what's the highest version that it still works on?
• Which Chrome/Version is installed on your machine? (Note that google-chrome and chromium are different!)
• Does it work if you use xvfb=True (virtual display) with headed=True (override default headless mode on Linux)?

This will help me figure out what's going on. Everything is working normally for me on macOS and Windows.

[EnmeiRyuuDev]

Hello @mdmintz ,
I also had the issue yesterday at all my VMs,
Not only Linux (Ubuntu 22.04, Debian 11), but also in a Windows Server 2022,
It works perfectly only in my personal laptop having Windows 11 Home,
Basically:
At VMs:

• it never passes without displaying the CF checkbox challenge
• uc_click seems to be detected, and it never recovers
• on the same SB browser, when clicking manually instead of letting SB clicks, it works pretty quick after the manual click
• tried with or without proxy, the same results
• versions:
  google-chrome version 125.0.6422.142 under Windows Server, google-chrome version 124.0.6367.118 under Ubuntu 22.04, google-chrome version 122.0.6261.111 under Debian 11.
  I also tried going in SeleniumBase version as old as v4.23.0, v4.20.8, but it didn't help (same blockage behavior).

At my personal laptop (Windows 11):

• most of the time, it passes without having to click anything
• when it has to click, it passes as well
• tried with or without proxy (same proxy that's used for the VMs) -> always working fine
• versions:
  google-chrome version 125.0.6422.142

It looks like Cloudflare is able to tell if I'm using a VM somehow, but yet, it works when clicking manually..
I can say it can be quickly reproduced on any Google Compute Engine VM.

I hope my description is helpful,
And thanks for the great project ^^