DNS Server Not Responding

Problem
The computer cannot resolve website names into IP addresses.

Symptoms

• Websites do not load.

• DNS error messages appear.

• Internet connection exists but websites cannot open.

• Ping by IP address works but domain names fail.

• Some websites load while others don't.

Possible Causes

• DNS server outage.

• Incorrect DNS settings.

• Router issues.

• ISP DNS problems.

• Firewall blocking DNS requests.

• Corrupted DNS cache.

Resolution

Step 1
Restart the router and computer.

Step 2
Flush the DNS cache.

Step 3
Change to a public DNS server.

Step 4
Restart the network adapter.

Step 5
Check DNS server settings.

Step 6
Test accessing a website by its IP address directly to confirm the issue is DNS-specific.

Step 7
Contact the ISP if necessary.

Prevention

• Use reliable DNS servers.

• Keep router firmware updated.

• Maintain proper network configuration.

• Monitor DNS performance.

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