Why is my Ethernet connected but showing no internet access?

An Ethernet cable connects your device to the router, but internet access requires the router to have a working WAN connection to your ISP. If the router's WAN light is off or amber, the issue is upstream — contact your ISP. If other devices on the same Ethernet switch work fine, the problem is your device's IP or DNS configuration.

Why does my Ethernet work on one device but not another?

If Ethernet works on one device but not another connected to the same port, the problem is device-specific. Common causes include a disabled network adapter, an outdated or corrupted Ethernet driver, incorrect IP configuration (check that DHCP is enabled), or a firewall rule blocking the connection.

Can a faulty Ethernet cable cause intermittent internet drops?

Yes. A damaged cable — one with a bent pin, a cracked connector, or internal wire breaks — can cause the link to drop and reconnect repeatedly. To test, swap the cable with a new one and monitor for drops over 30 minutes. If drops stop, the cable was the cause.

How do I know if my Ethernet port is broken?

Connect a known-working Ethernet cable to the port. If the link light on the port (a small LED near the connector) does not light up, the port or cable is faulty. Try a different cable first. If the light still does not appear, the port may be damaged — a USB-to-Ethernet adapter is an effective workaround.

Is Ethernet faster than WiFi for internet speed?

Yes, in almost all cases. Ethernet eliminates wireless interference, provides consistent low latency, and supports full-duplex communication. A Cat6 Ethernet cable on a Gigabit connection reliably achieves 900+ Mbps, while WiFi 6 under typical home conditions delivers 300-600 Mbps with higher latency variability.

Ethernet Connected But No Internet — Fix

An Ethernet connection that shows as connected in Windows — the cable icon appears in the system tray, Device Manager shows the adapter working — but produces no internet access is almost always a software configuration issue rather than a hardware failure.

According to Microsoft’s Windows Ethernet troubleshooting documentation, the most common causes are a corrupted IP or DNS configuration, a driver that needs updating, or a loose cable that appears connected but is not transmitting reliably.

Ethernet no internet layer stack: Physical cable, Network Adapter, TCP/IP stack, Router DNS — each layer’s fix

What causes Ethernet connected but no internet

The Windows status “Connected” for an Ethernet connection means the adapter detected a link signal from the router — it does not confirm that internet traffic is flowing. No internet errors occur when:

IP address not assigned — the adapter shows 169.254.x.x (APIPA), which means DHCP failed and no valid IP was received from the router
DNS failure — the adapter has an IP but cannot resolve domain names
Corrupted Winsock or TCP/IP stack — Windows cannot process network traffic correctly
Router WAN issue — the router itself has no internet, affecting all connected devices
Faulty cable or port — the cable is intermittently connected, causing a “Connected” status but no reliable data flow
Outdated Ethernet driver — the driver does not correctly manage the adapter’s connection state

How to fix Ethernet connected but no internet

Step 1 — Check the cable and try a different port

A cable that appears connected — the plug is inserted, the adapter shows a link — can still be faulty. The RJ45 connector may have bent pins that pass a link signal but drop data packets.

Unplug the Ethernet cable from the computer’s Ethernet port
Unplug it from the router or switch
Inspect both connectors for bent or damaged pins
Check the cable for kinks, cuts, or tight bends — damage to the cable jacket often causes intermittent failure
Plug the cable back in firmly at both ends — you should hear a click
Try a different port on the router — some router ports fail while others work
If you have a spare cable, swap it to eliminate the cable as the cause

Step 2 — Restart the router and reset the adapter

Restarting both the router and the Ethernet adapter simultaneously clears the DHCP lease and forces a fresh connection negotiation.

Restart the router:

Unplug the router’s power cable
Wait 30 seconds

While waiting, reset the Ethernet adapter:

Right-click Start → Device Manager
Expand Network adapters
Right-click your Ethernet adapter (typically labelled “Gigabit Ethernet,” “Realtek PCIe,” “Intel Ethernet,” etc.)
Select Disable device

Reconnect:

Plug the router back in and wait for it to fully start (60–90 seconds)
In Device Manager, right-click the Ethernet adapter → Enable device

Windows requests a new IP address from the router as the adapter enables. Check whether internet access is restored.

Step 3 — Reset the network stack

A corrupted Winsock or TCP/IP configuration prevents Windows from processing Ethernet traffic correctly — even when the adapter is connected and the router is working.

Right-click Start → Terminal (Admin) or Command Prompt (Admin)
Run each command in sequence:

netsh winsock reset
netsh int ip reset
ipconfig /flushdns
ipconfig /release
ipconfig /renew

Restart the computer after all commands complete

After restarting, check whether the Ethernet connection now has internet access.

To confirm the IP address was properly assigned after the restart:

Open Command Prompt
Run ipconfig
Under your Ethernet adapter, the IPv4 Address should be in your network’s range (typically 192.168.1.x or 192.168.0.x) — not 169.254.x.x, which indicates DHCP failure

Step 4 — Change DNS servers

If the IP address is correctly assigned but internet access is still unavailable, the DNS servers provided by your ISP may be unresponsive.

Go to Control Panel → Network and Sharing Center → Change adapter settings
Right-click your Ethernet adapter → Properties
Select Internet Protocol Version 4 (TCP/IPv4) → Properties
Select Use the following DNS server addresses
Enter:
- Preferred DNS server: 8.8.8.8
- Alternate DNS server: 8.8.4.4
Click OK → Close

Test internet access immediately after changing DNS — no restart is required for DNS changes to take effect.

Step 5 — Update or reinstall the Ethernet driver

An outdated or corrupted Ethernet driver can cause the adapter to report a connection while failing to pass traffic correctly.

Update the driver:

In Device Manager, right-click the Ethernet adapter → Update driver → Search automatically for drivers
If Windows finds and installs an update, restart and test

Reinstall the driver:

Right-click the Ethernet adapter → Uninstall device
If the option appears, check Attempt to remove the driver for this device
Click Uninstall
Restart the computer — Windows reinstalls the driver automatically

If Windows does not find a driver:

Go to the computer manufacturer’s support site (Dell, HP, Lenovo, etc.)
Search for your model and download the LAN or Ethernet driver
Install it manually

How to verify the fix

Open Command Prompt and run ipconfig — confirm the Ethernet adapter shows a valid IPv4 address (not 169.254.x.x)
Run ping 8.8.8.8 — you should see replies with response times, not “Request timed out”
Run ping google.com — if 8.8.8.8 works but google.com does not, DNS is still the issue
Open a browser and load a page

Frequently asked questions

Ethernet works on one computer but not another on the same cable. This confirms the cable and router port are working. The issue is with the second computer’s adapter, driver, or network configuration. Follow Steps 3–5 on the affected computer.

Ethernet stopped working after a Windows update. Windows updates occasionally replace OEM Ethernet drivers with generic versions. Download the Ethernet driver directly from the computer manufacturer’s support site (not Windows Update) and reinstall it.

Ethernet shows “Unidentified network” and no internet. An “Unidentified network” status means Windows received either no IP address or an APIPA address (169.254.x.x). The router’s DHCP server is not responding. Restart the router, reset the adapter, and run the network reset commands in Step 3.