Is there a way to bypass sites that Tails OS blocks?
Tenderly simulations are great for multi factor verification MFV of Safe smart account crypto transactions txs. Simulations worked when I started testing Tails as a secure Safe environment months ago. Then it stopped working in a later Tails version.
Sample tx
• Shows as “Simulation successful” in Safe interface
• Throws error when opening Tenderly link in Tails “Error: Forbidden”
• Same link opens successfully outside of Tails
My estimate is that Tails is blocking Tenderly. I wonder if Tenderly could be blocking the request from Tails…
Simulation successful
Simulation blocked
This is almost certainly Tenderly blocking Tor exit nodes rather than Tails blocking Tenderly. Many web3/dev platforms use Cloudflare or strict WAF rules that throw a 403 Forbidden whenever traffic comes from a known Tor IP.
A couple of things you can try:
-
Click the New Tor Circuit button in Tor Browser (Ctrl+Shift+L) to switch exit nodes—sometimes you land on an IP that isn’t flagged yet.
-
Check if Tenderly requires Cloudflare captcha verification that fails quietly in Tor Browser when security levels are set high.
-
If you just need to review the simulation, open the URL via an Onion circuit relay or run Tor through a trusted bridge/VPN upstream (though that breaks Tails’ default stream isolation).
I appreciate the feedback!
I’ll test out the New Tor Circuit, follow up with Tenderly team to ask about the Cloudflare captcha, and will research how to open the URL via an Onion circuit relay or run Tor through a trusted bridge/VPN upstream, and report back here.
I tested creating multiple new Tor circuits today unsuccessfully, with the site in question Tenderly remaining blocked.
The other 3 strategies will be tested next.
open the URL via an Onion circuit relay
The Tenderly link has been attempted to be opened using an Onion circuit relay by entering the URL in Tor Browser which does this by default.
Run Tor through a trusted bridge/VPN upstream
Currently I connect to a Tor bridge when connecting to the Wi-Fi network in Tails OS. Once the Network Unavailable error is resolved I can test without the bridge too.
I’m going to hold off on the upstream VPN approach as it seems like it would take a lot of trial and error to work around Tails OS VPN restrictions.
Because I’m blocked from further testing due to the Network Unavailable error I will wait to test without the bridge and follow up with the Tenderly team to check on the Cloudflare verification requirement.
