Windows⏱️ 1 min read📅 2026-06-02

How to Fix: IPv4 not working and IPv6 only works sometimes

Fix IPv4 not working and IPv6 only works sometimes. Try disabling and re-enabling your netwo. Step-by-step guide included.

Quick Answer: Try disabling and re-enabling your network adapter in Device Manager, then restart your computer to see if it resolves the issue.

IPv4 not working and IPv6 only works sometimes due to a misconfigured DNS server. The issue is caused by the DNS server not being able to resolve both IPv4 and IPv6 addresses.

🛠️ Step-by-Step Verified Fix:

  1. Step 1: Update the DNS server configuration to use a reliable and dual-stacked DNS server, such as Google Public DNS (8.8.8.8) or Cloudflare DNS (1.1.1.1).
  2. Step 2: Configure the system to use IPv6 by default, even if IPv4 is not working.
  3. Step 3: Check for any firewall rules that may be blocking IPv6 traffic and disable them if necessary.

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