How to access local HTTP service from Tor Browser?

[Patrick]

@anon54700922

What about the idea to run the HTTP server in a separate VM,

I don’t see how that helps to mitigate the issue caused by Firefox?

Access a fake remote domain name?

• Fake in this context means “not remote, actually running on your computer somewhere”.
• I don’t see how one could sanely reconfigure Tor Browser to visit a http(s)://fake-domain.com/ubo-list.fileformat running in your local or any other VM. Related:

Firewall implementation for Qubes Whonix ?

related, written just now: Tor Browser Filtering Tor Browser versus /etc/hosts Tor Browser versus DNS over HTTPS Tor Browser vs Firewalls Based Filtering Tor Browser Filtering Options

@anon54700922

Is there a way for sys-whonix to connect to such server without torifying that particular connection (only)?

• Practically: No, Undocumented, Untested or Unsupported Features.
  • Very difficult due to: Tor Browser Filtering

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• Theoretically: Yes.
  • As per Self Support First Policy for Whonix.
  • Question rephrased to:

    • Is there a way for Net Qube in Qubes to recognize a specific URL and redirect it to some locally running HTTP server?

    • But the actual and better even less specific question would be:

      • Is there a way for socks proxy to recognize a specific URL and redirect it to some locally running HTTP server?

Really difficult.

1. exercise this on (Qubes) Debian (unspecific to Qubes, Whonix, Debian)
2. wretch your own, additional socks proxy between Tor Browser and a Tor SocksPort (difficult exercise in itself)
3. do the filtering (redirection) at with the custom socks proxy

Basically you would need to MitM your own Tor socks traffic.

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Or you’d need to fork Tor to add such a feature.