If the ports are not accessible, use the mentioned method below. This affects the initial node registration and payment process.

Important Notes:

• This workaround is only needed for the initial node payment.
• Once the payment is completed and data is stored, you will not need to access the container again.
• The Mysterium Node UI inside the container runs on port 4449.
• You must perform this process for each Mysterium container individually.

Follow these steps to temporarily expose the node UI:

1. Enter the Mysterium container name present in containernames.txt file

   docker exec -it <MYSTERIUM_CONTAINER_NAME> sh

2. Install OpenSSH client

   apk add openssh-client

3. Start the SSH tunnel

   ssh -R 80:127.0.0.1:4449 serveo.net

4. Access the Node UI

   • Serveo will show a public URL (example: https://abc123.serveo.net).
   • Open this URL in your browser.
   • You can now complete the initial node payment/registration.

5. Finish

   • After payment is done, press Ctrl + C to close the tunnel.
   • Then exit the container:

     exit

# Replace "myst-node-1" with your actual container name
docker exec -it myst-node-1 sh
apk add openssh-client
ssh -R 80:127.0.0.1:4449 serveo.net
# (Complete payment in browser, then Ctrl+C)
exit

• Multiple containers: Repeat the full process for every Mysterium node.
• This method uses Serveo’s free SSH remote forwarding service and requires no changes to your host firewall or ports.