403 error

[vlnst]

What's Happening?

Error: Received a non-OK status code 403 when trying to use AnonymousOverflow. It seems upstream started using CloudFlare and this is causing issues

How to reproduce:

Go to any instances for example https://ao.bloat.cat/questions/799272/why-cant-one-ssl-certificate-be-used-for-multiple-machines or https://ao.maid.zone/questions/799272/why-cant-one-ssl-certificate-be-used-for-multiple-machines

[dfuentes87]

I confirm this as well for my private instance. I tried the workaround mentioned #87 but it doesnt seem to fix the issue apart from changing the status code:
Error: Received a non-OK status code 0

[dave0003]

I'm also getting:

Error: Received a non-OK status code 403

On 4 private instances in different countries (in US, Asia, Europe).

[httpjamesm]

Looks like Stack overflow doesn't want us 💔

[IAmChrisAMA]

It's most likely due to the Cloudflare challenge before loading the site.
Maybe we can use FlareSolverr or similar software to bypass it...

[dave0003]

I can access stack overflow directly on the same connection without a cloudflare challenge, so I don't think that's generally the problem.

I was able to get my instance working with FlareSolverr as @IAmChrisAMA suggested:
https://ao.ngn.tf/questions/799272/why-cant-one-ssl-certificate-be-used-for-multiple-machines

Please note that I did not thoroughly test this solution, use this only as a temporary solution, here are the instructions:

• Add FlareSolverr support to AnonymousOverflow, here is my implementation
• Apply this patch to FlareSolverr
• If you are using docker, build the new images and place AnonymousOverflow and FlareSolverr in the same network so AnonymousOverflow can connect to FlareSolverr to get the solution for the cloudflare challenge

If you want an easier solution, you can temporarily use my images, here is an example compose file:

services:
  anonymousoverflow:
    container_name: anonymous_overflow
    image: git.ngn.tf/ngn/anonymous_overflow:latest
    environment:
      APP_URL: "https://ao.example.com"
      JWT_SIGNING_SECRET: "topsecret"
      FLARESOLVER: "http://flaresolverr:8191"
      THEME: "dark"
    ports:
    - 8080:8080
    security_opt:
    - no-new-privileges:true
    cap_drop:
    - ALL
    read_only: true
    restart: unless-stopped

  flaresolverr:
    container_name: anonymous_overflow_flaresolverr
    image: git.ngn.tf/ngn/flaresolverr:latest
    environment:
      LOG_LEVEL: "info"
      TZ: "Europe/Berlin"
      LANG: "en_US"
    security_opt:
    - no-new-privileges:true
    restart: unless-stopped

Again, this is just a temporary solution

Also fuck cloudflare

I just realized FlareSolverr already built the docker image with the patch I mentioned:
FlareSolverr/FlareSolverr#1282

So for FlareSolverr use this image:
ghcr.io/flaresolverr/flaresolverr:pr-1282

[dave0003]

I'm seeing the cloudflare challenge on my desktop sometimes, now, too. But if I revisit without clearing my cookies, there's no challenge the second time.

Maybe there's a way to copy a desktop cookie somewhere that it could use? Could that be simpler?

[goremykin]

@ngn13, Thank you! Would you mind building an ARM image as well?

@goremykin i just did, let me know if it works

[goremykin]

@ngn13, Yep, the anonymous_overflow image works. However, the flaresolverr/flaresolverr:pr-1282 image crashes. I'll take a look at it later.

@goremykin i suggest you build the image yourself or report the issue to flaresolverr project

[dave0003]

This is what I keep getting when I try to use the docker image:

anonymous_overflow_flaresolverr  | 2025-05-18 20:14:23 INFO     Challenge detected. Title found: Just a moment...
anonymous_overflow_flaresolverr  | 2025-05-18 20:14:31 ERROR    Error: Error solving the challenge. Timeout after 12.0 seconds.
anonymous_overflow_flaresolverr  | 2025-05-18 20:14:31 INFO     Response in 13.563 s
anonymous_overflow_flaresolverr  | 2025-05-18 20:14:31 INFO     172.18.0.2 POST http://flaresolverr:8191/v1 500 Internal Server Error

[goremykin]

@dave0003, I had the same. The 21hsmw/flaresolverr:nodriver image is able to solve cloudflare challenge in my case, but then anonynousoverflow fails with
failed to get https://stackoverflow.com/questions/13995857/?answertab=scoredesc: failed to parse body: Time.UnmarshalJSON: input is not a JSON string[GIN]