Clients rely on DNS to resolve hostnames like server01.company.local into IP addresses. Common symptoms of failure include inability to access internal resources, login delays, or failed nslookup results.
✅ Check DNS Settings:
ipconfig /all
Confirm client is using the correct internal DNS server.
✅ Test Resolution:
nslookup server01 ping server01
If nslookup fails but ping by IP works, DNS is likely misconfigured.
✅ Flush and Renew:
ipconfig /flushdns ipconfig /release ipconfig /renew ipconfig /registerdns
✅ Check for Static Config Errors:
Ensure there are no manually entered wrong DNS servers in IPv4 properties.
✅ Use dcdiag /test:dns:
On domain controllers to check DNS service health.
