Software⏱️ 3 min read📅 2026-06-11

How to Fix: Unable to open github.com Error code: DNS_PROBE_FINISHED_NXDOMAIN

DNS_PROBE_FINISHED_NXDOMAIN error on Ubuntu 14.04 with wired connection.

Quick Answer: Check your DNS server settings, as they might be misconfigured or outdated.

📋 Table of Contents

  1. 🔍 Why This Happens
  2. 🔧 Proven Troubleshooting Steps
  3. 💡 Conclusion

The error 'Unable to open github.com Error code: DNS_PROBE_FINISHED_NXDOMAIN' affects users who are unable to access GitHub's website due to a DNS lookup failure. This issue can be frustrating for developers and individuals relying on the platform for collaboration and data sharing.

This error is often caused by misconfigured network settings, unresponsive DNS servers, or firewalls preventing access to the internet. In this guide, we will walk you through the steps to troubleshoot and resolve this issue.

🔍 Why This Happens

  • The primary reason for this error is a misconfigured DNS server or an unresponsive DNS server. When your system cannot resolve the domain name 'github.com' to its IP address, it results in the DNS_PROBE_FINISHED_NXDOMAIN error.
  • Another alternative cause could be a firewall or network configuration issue that prevents Chromium (used by Chrome) from accessing the internet.

🔧 Proven Troubleshooting Steps

Update DNS Resolver and Network Settings

  1. Step 1: Step 1: Update your DNS resolver to a reliable service. You can do this by installing the 'bind9' package, which is a popular and widely-used DNS server. Open a terminal and run the command `sudo apt-get update && sudo apt-get install bind9`.
  2. Step 2: Step 2: Configure your network settings to use a static IP address or obtain an IP address from your router's DHCP server. This will ensure that your system can resolve domain names correctly. You can do this by running the command `sudo dhclient -r /dev/null` followed by `sudo dhclient`.
  3. Step 3: Step 3: Verify that your DNS resolver is working correctly by visiting a website like 'whatismyip.com' or 'dns.google'. If you see an IP address, it means your DNS resolver is functioning properly.

Reset Network Settings and Restart Chromium

  1. Step 1: Step 1: Reset your network settings to their default values. You can do this by running the command `sudo dhclient` followed by `sudo dhcpcd -k`. This will reset your network settings, but be aware that it may also disconnect you from the internet.
  2. Step 2: Step 2: Restart Chromium (Chrome) to ensure that any cached DNS resolution issues are cleared. You can do this by closing and reopening Chrome or running the command `killall chromium` followed by `chromium --new-window https://github.com`.

💡 Conclusion

To resolve the 'Unable to open github.com Error code: DNS_PROBE_FINISHED_NXDOMAIN' issue, you can try updating your DNS resolver and network settings. If that fails, resetting your network settings and restarting Chromium may also help. Remember to verify that your DNS resolver is working correctly before attempting to access GitHub's website.

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