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Asked: 2024-09-27T00:32:30+05:30 In:

I’m experiencing issues with my wired Ethernet connection on Ubuntu 18.04. Despite being connected, I’m unable to access the internet. I’ve tried checking the cable and the network settings, but nothing seems to resolve the problem. Has anyone encountered a similar issue or can provide guidance on how to troubleshoot this?

I’ve run into a pretty frustrating problem with my wired Ethernet connection on Ubuntu 18.04. So, here’s the deal: I’ve got my PC hooked up with a cable, and the connection looks good on my end—I’ve checked all the physical stuff, like the cable and the ports. I even tried different cables and switched them out just to be sure they’re working properly. Still, I can’t seem to get any internet access!

I’ve gone through the network settings multiple times, but I just can’t seem to figure it out. When I go to the network manager, it shows that I’m connected but asks for an IP address. I tried setting a static IP address and DNS servers, but no luck there either. I even tried disabling and re-enabling the connection to see if that would trigger something.

I’m not sure if this problem started after a recent system update or if something else is going on under the hood. I was thinking about resetting the network settings entirely, but I really don’t want to mess anything up more than it already is!

I ended up looking through a bunch of forums, and I found a few common suggestions, like checking the Firewall settings and making sure there aren’t any rogue settings preventing me from connecting, but nothing has worked so far. Maybe there are some commands I could run in the terminal to help troubleshoot? It’s just annoying when everything looks fine, but I still can’t get online!

Has anyone else dealt with something like this? I’d love to hear if there are any helpful tips or simpler troubleshooting steps I might’ve overlooked. I’m kind of at my wit’s end and could really use some guidance or just some shared experiences to feel less alone in this tech struggle. Any suggestions would be awesome!

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    2 Answers






    1. Ethernet Connection Troubleshooting Tips


      Ethernet Connection Troubleshooting

      Sounds super frustrating, right? Here are a few things you can try that might help get you back online:

      • Check Network Manager: Sometimes, resetting the network connection can work wonders. In the terminal, you can try resetting it with:
        sudo service network-manager restart
      • Check IP Address: After restarting the network manager, see if you get an IP. You can run:
        ip addr
        to check if your Ethernet interface has an IP.
      • Manually Get IP: If your connection is still asking for an IP address, you could try DHCP with:
        sudo dhclient -v
        This should request an IP address from your router.
      • Check for Blocked Connections: Sometimes, Firewalls get too aggressive. Check your firewall status with:
        sudo ufw status
        If it’s active, you can disable it temporarily with:
        sudo ufw disable
        Just remember to turn it back on later with sudo ufw enable.
      • Look for System Updates: If this all started after a system update, there might be a fix available. Run:
        sudo apt update && sudo apt upgrade
        to make sure everything’s in order.
      • Check Hardware Drivers: Sometimes drivers can be the issue, so double-check your driver status:
        lspci -nnk
        Look for your Ethernet controller there and make sure it’s using the correct driver.

      If you still can’t connect after trying these tips, it might be worth checking online forums or asking for more help. Sometimes a fresh set of eyes can spot something we miss!

      Good luck, and hang in there! It can be a pain, but these tech struggles happen to everyone!


    2. It sounds like you’ve already gone through a lot of troubleshooting steps, but there are a few more commands and checks you can perform to get to the bottom of the issue. Firstly, you can check your network adapter status by running ip a in the terminal. This command will display all of your network interfaces along with their current states and IP addresses. Look for your Ethernet interface (commonly named eth0 or similar) and see if it has a valid IP address assigned. If it shows 169.254.x.x, this indicates that your system couldn’t get a valid IP from the DHCP server, which might suggest a misconfiguration or that the DHCP server isn’t reachable. In that case, try running sudo dhclient -r followed by sudo dhclient to release and renew the IP address from the DHCP server.

      If the connection still fails, consider checking the system logs for clues. You can view the logs using dmesg or checking the file /var/log/syslog for any networking-related messages. Also, ensure that the NetworkManager service is running correctly with sudo systemctl status NetworkManager. Another common issue is firewall settings that might be affecting your connection; you can temporarily disable the firewall using sudo ufw disable to see if that resolves the issue. If all else fails, resetting NetworkManager configuration to its defaults might be worth a try. If you don’t want to reset everything, you can back up the existing configurations by copying the files located in /etc/NetworkManager/ before making changes. Remember to reboot your system after making any significant changes to ensure they take effect.

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