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Upgraded to ubuntu 18.04 & MOdzilla products will not connect to internet. Network connection is there. Pinged just fine.

  • 10 replies
  • 1 has this problem
  • Last reply by FFus3r

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I just upgraded to Ubuntu 18.04 and neither Firefox or Thunderbird will connect to the internet. I can ping just fine. I turned off the firewall and they still will not connect. They connected just fine before the upgrade. I changed the proxy to no proxy and system proxy. Still no luck. What am I missing?

All Replies (10)

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try this,

In the address bar, type about:config and press enter and accept the warning, search for network.dns.disableIPv6 and double-click to set its value

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It was already disabled but I enabled it and same issue so I disabled it again. Still same issue.

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go to options > general > network > settings

and choose Auto-detect proxy settings for this network

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Tried that also. Didn't make a difference. Still receive the server not found error.

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Some additional information...

When I ping, and others I receive a cannot find host or server message.

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NoGMO said

Some additional information... When I ping, and others I receive a cannot find host or server message.

That to me would indicate ISP problems.

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Try this:

TCP/IP stack repair options for use with Windows XP with SP2 or SP3.

Start, Run, CMD, OK to open a command prompt.

Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

Reset TCP/IP stack to installation defaults. netsh int ip reset reset.log

Reboot the machine.

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Thanks, but not a Windows box.

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The wireless connection is being made. I just verified with the my isp.

It seems to be something in netplan. I created a 01-netcfg.yaml in /etc/netplan and added


        addresses: [,]

Rebooted the box and still am having difficulties with urls.

Any ideas?

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