When the internet is not working properly, it often feels like everything is broken. Websites won’t load, email stops working, and cloud apps disconnect.
When the internet is not working properly, it often feels like everything is broken. Websites won’t load, email stops working, and cloud apps disconnect. In many cases, the problem is not your internet line – it is a DNS or network routing issue.
This guide explains how to identify DNS and internet problems and how to fix them correctly.
What Is DNS and Why It Matters
DNS (Domain Name System) is what translates website names like google.com into IP addresses that computers understand.
If DNS fails:
Websites will not open
Apps will show “No Internet”
Wi-Fi may appear connected but nothing works
This makes it look like the internet is down, even when the connection is actually active.
Common Signs of DNS or Internet Problems
You may be facing a DNS issue if:
Wi-Fi shows “Connected” but websites do not load
Some websites work but others don’t
Email or cloud apps fail to sync
Cameras or printers go offline
VPN or remote connections fail
Most Common Causes
1. Router or Modem Issues
If the router is overloaded or has bad firmware, DNS requests fail.
2. ISP DNS Failure
Your internet provider’s DNS servers may be down or slow.
3. Incorrect Network Settings
Wrong IP, DNS, or gateway settings cause devices to lose internet access.
4. Firewall or Security Software
Firewalls can block DNS traffic.
5. Network Congestion
Too many devices using the network can overwhelm DNS handling.
How to Troubleshoot DNS and Internet Problems
Step 1 — Check If the Internet Is Really Down
Try opening:
google.com
cloudflare.com
If nothing loads, continue.
Step 2 — Restart Network Devices
Turn off:
Router
Modem
Wi-Fi access points
Wait 60 seconds and restart:
Modem → Router → Devices
This clears most DNS and routing errors.
Step 3 — Test DNS
Open Command Prompt or Terminal:
Windows:
Mac:
If it fails, DNS is not working.
Step 4 — Change DNS Servers
Use public DNS for better reliability.
Set DNS to:
8.8.8.8
8.8.4.4
or
1.1.1.1
1.0.0.1
This fixes most ISP DNS failures.
Step 5 — Flush DNS Cache
Windows: ipconfig /flushdns
Mac: sudo dscacheutil -flushcache
This clears old, broken DNS records.
Step 6 — Check Firewall and Router
Make sure:
DNS ports (53) are not blocked
No network rules are blocking traffic
Why This Keeps Happening in Offices
Most business internet problems happen because:
Routers are not properly configured
Old networking equipment is still in use
Cameras, printers, and users share one network
No professional IT management is in place
Why Businesses Need Professional Network Support
DNS and internet issues are not random. They are signs of:
Poor network design
Outdated hardware
Misconfigured routers
Security risks
AetherGeeks ensures:
Stable DNS resolution
Reliable internet connectivity
Proper router and firewall configuration
Minimal downtime
When to Contact AetherGeeks
If your internet:
Works sometimes
Drops randomly
Shows Wi-Fi but no websites load
Disconnects printers or cameras
You need professional network support.
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