Ethereum: How to Fix the “No Block Source Available” Error
Are you frustrated with your Ethereum wallet, especially when trying to connect to the blockchain or recover transactions? A common issue reported by users is encountering an error message that says “No Block Source Available” when trying to launch the Bitcoin-Qt wallet. In this article, we will walk you through the troubleshooting steps and offer solutions to resolve this error.
Understanding the Error
The “No Block Source Available” error usually occurs when the Bitcoin-Qt wallet cannot find a valid block source for the Ethereum blockchain. This can happen for several reasons:
- Proxy Server Issues: Some users have reported that their proxy server is not working properly, preventing them from connecting to the Ethereum network.
- UPnP Port Conflicts
: The Bitcoin-Qt wallet may be blocked by firewalls or operating systems due to the UPnP (Universal Plug and Play) protocol being enabled on a non-standard port.
Troubleshooting Steps
To resolve the “block source unavailable” error, follow these steps:
Step 1: Check your proxy settings
- Make sure your proxy server is configured correctly.
- Try disabling the proxy server completely and see if you can manually connect to the Ethereum network.
Step 2: Test with a different proxy or port
Try using a different proxy server or a non-standard port (e.g. 8080) to see if that resolves the issue.
Step 3: Enable UPnP on your router
- Check your router settings and enable UPnP (Universal Plug and Play).
- Make sure the UPnP protocol is enabled on the desired port (usually 80 for HTTP or TCP port 80).
Step 4: Restart your Bitcoin-Qt wallet
- Close your Bitcoin-Qt wallet and restart it.
- Try manually connecting to the Ethereum network.
Step 5: Update your operating system and wallet software
Make sure your operating system and wallet software are up to date, as newer versions can resolve compatibility issues with Ethereum-based services.
The card port that uses UPnP is enabled and the proxy is disabled
In some cases, the Bitcoin-Qt wallet may be configured to use UPnP on a specific port (e.g. 80). To resolve this issue:
- Open your router settings and uncheck the “Enable UPnP” option.
- Restart your router.
Alternatively, you can try updating your operating system or wallet software to the latest version, which may include updated configurations for Ethereum-based services.
Additional Tips
- If you are using a VPN service, make sure it does not block access to the Ethereum network.
- Be careful when configuring proxy settings, as excessive changes can cause conflicts with other applications or services on your system.
- Consider restarting your Bitcoin-Qt wallet after any update or configuration change.
By following these troubleshooting steps and adjusting your configuration accordingly, you should be able to resolve the “block source unavailable” error and regain access to your Ethereum-based services.