Ethereum: How to Fix “No Block Source Available” Error
Are you frustrated with your Ethereum wallet, especially when trying to connect to the blockchain or catch up on transactions? A common issue reported by users is the “No Block Source Available” error message when trying to launch the Bitcoin Qt wallet. In this article, we will walk you through the troubleshooting steps and provide solutions to fix 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 be due to several reasons:
- Proxy Server Issues
: Some users have reported that their proxy server is not working properly and thus they are unable to connect to the Ethereum network.
- UPnP port conflicts: Bitcoin Qt wallet may be blocked by firewalls or operating systems because the UPnP (Universal Plug and Play) protocol is enabled on a non-standard port.
Troubleshooting Steps
To fix the “No block source available” error, follow these steps:
Step 1: Check your proxy settings
- Make sure your proxy server is configured properly.
- Try disabling the proxy server completely and see if you can connect to the Ethereum network manually.
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 fixes the problem.
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 the Bitcoin Qt wallet
- Close and restart the Bitcoin Qt wallet.
- Try to connect to the Ethereum network manually.
Step 5: Update your operating system and wallet software
Make sure your operating system and wallet software are up to date, as newer versions may fix compatibility issues with Ethereum-based services.
Map port with UPnP is enabled and proxy is disabled
In some cases, the Bitcoin Qt wallet may be configured to use UPnP on a specific port (e.g. 80). To fix this issue:
- Open your router’s settings and disable the “Enable UPnP” option.
- Restart your router.
Alternatively, you can try updating your operating system or wallet software to the latest versions, which may include updated configurations for Ethereum-based services.
Additional tips
- If you use a VPN service, make sure it does not block access to the Ethereum network.
- Be careful when configuring proxy settings, as excessive changes may 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 “No block source available” error and regain access to your Ethereum-based services.
