[SOLVED] Cannot Connect to Internet After Upgrading to Ubuntu 17

Corvette · 08-06-2017, 01:48 PM

I recently upgraded to Ubuntu 17 from an older version. Now, when I try to navigate to a webpage in Firefox, I get a Server not Found error. I understand this appears to be a known issue with the district version. After looking into the issue a bit, I tried setting DNNSEC=off in my systemd/resolved.conf file and restarting the service, but no success. Typing in systemd-resolve www.google.com returned the following:

Code:

www.google.com: resolve call failed. No appropriate servers or networks for name found.

Attempting to ping www.google.com also fails with a Name or service not known message.

Any advice would be appreciated. I am using an Ethernet connection.
Thanks.

Corvette · 08-06-2017, 03:51 PM

Turns out it the issue was not related to DNS resolution. For some reason, my connection was not being recognized. For reference I ran

Code:

 sudo lshw -C network

and noticed that my Ethernet interface was DISABLED. I noted the "logical name" of the device from the output:

Code:

 *-network                 
       description: Ethernet interface
       product: 82567LM-3 Gigabit Network Connection
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       logical name: enp0s25
       version: 02
       serial: 84:2b:2b:ba:13:e7
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k duplex=full firmware=0.4-3 ip=192.168.1.4 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:33 memory:f7ae0000-f7afffff memory:f7ad9000-f7ad9fff ioport:ece0(size=32)

and added it to my /etc/network/interfaces file.

Code:

auto enp0s25
iface enp0s25 inet dhcp
auto lo
iface lo inet loopback

Finally, I rebooted the system. Not quite sure why I had to perform the preceding steps; I believe I just had to plug in the cable when I originally installed Ubuntu.