I can connect to google, but not to duckduckgo.
$ ping google.com
PING google.com(arn09s19-in-x0e.1e100.net (2a00:1450:400f:80c::200e)) 56 data bytes
64 bytes from arn09s19-in-x0e.1e100.net (2a00:1450:400f:80c::200e): icmp_seq=1 ttl=116 time=15.4 ms
64 bytes from arn09s19-in-x0e.1e100.net (2a00:1450:400f:80c::200e): icmp_seq=2 ttl=116 time=16.5 ms
^C
--- google.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 15.362/15.916/16.471/0.554 ms
$ ping duckduckgo.com
ping: connect: Network is unreachable
I think that's because google has ipv6 and duckduckgo hasn't, as shown by nslookup.
$ nslookup google.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: google.com
Address: 216.58.207.238
Name: google.com
Address: 2a00:1450:400f:80c::200e
$ nslookup duckduckgo.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: duckduckgo.com
Address: 52.142.124.215
The same applies for facebook.com which has ipv6 and works, and github.com wich hasn't and doesn't.
I bought an internet cable which plugs directly to the router, and the problem stayed. But when I turn off wifi, unplug the cable and use USB-thetering via my Android smartphone everything works fine (the smartphones mobile data is turned off and it is connected to the wifi). My flatmates have no connectivity problems on their devices. I used the computer for one year now and the problem only started this morning.
Is there something I can do?
Solutions I tried
I looked at this post. The proposed solution was to disable ipv4 in the wifi's graphical configuration, and setting "Method" to "Automatic, addresses only" in ipv6 the wifi's settings. I don't have this option in my settings, and setting it to "Automatic" or "Automatic, addresses only" didn't change anything.
I also tried this solution
$ sudo dhclient -r wlp2s0
Killed old client process
$ sudo dhclient wlp2s0
That didn't solve the problem but changed ping's error message:
$ ping duckduckgo.com
PING duckduckgo.com (52.142.124.215) 56(84) bytes of data.
From _gateway (192.168.1.1) icmp_seq=10 Destination Net Unreachable
^C
--- duckduckgo.com ping statistics ---
32 packets transmitted, 0 received, +1 errors, 100% packet loss, time 31690ms
Edit
usb0 is my Android device.
Output of ip route:
$ ip route
default via 192.168.42.129 dev usb0 proto dhcp metric 100
default via 192.168.1.1 dev wlp2s0 proto dhcp metric 600
169.254.0.0/16 dev wlp2s0 scope link metric 1000
192.168.1.0/24 dev wlp2s0 proto kernel scope link src 192.168.1.33 metric 600
192.168.42.0/24 dev usb0 proto kernel scope link src 192.168.42.224 metric 100
Output of route
$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default _gateway 0.0.0.0 UG 100 0 0 usb0
default _gateway 0.0.0.0 UG 600 0 0 wlp2s0
link-local 0.0.0.0 255.255.0.0 U 1000 0 0 wlp2s0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp2s0
192.168.42.0 0.0.0.0 255.255.255.0 U 100 0 0 usb0
output of ifconfig:
$ ifconfig
enx00e04e3a4476: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.36 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 2001:4646:58b8:0:1de0:9fed:a9ea:a5d7 prefixlen 64 scopeid 0x0<global>
inet6 fe80::a9bd:79ab:e302:83ff prefixlen 64 scopeid 0x20<link>
inet6 2001:4646:58b8:0:bec2:942:e66:f0da prefixlen 64 scopeid 0x0<global>
inet6 2001:4646:58b8:0:cd74:eed2:2eb2:e437 prefixlen 128 scopeid 0x0<global>
ether 00:e0:4e:3a:44:76 txqueuelen 1000 (Ethernet)
RX packets 315 bytes 38645 (38.6 KB)
RX errors 0 dropped 3 overruns 0 frame 0
TX packets 468 bytes 62610 (62.6 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 12520 bytes 1072501 (1.0 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 12520 bytes 1072501 (1.0 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
usb0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.42.239 netmask 255.255.255.0 broadcast 192.168.42.255
inet6 fe80::732b:158e:d3d9:4409 prefixlen 64 scopeid 0x20<link>
ether 96:bf:5c:93:c0:7a txqueuelen 1000 (Ethernet)
RX packets 1370 bytes 426638 (426.6 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1581 bytes 412547 (412.5 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.33 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::6f50:6f2d:d7a8:f848 prefixlen 64 scopeid 0x20<link>
inet6 2001:4646:58b8:0:650e:8cfb:7323:d714 prefixlen 64 scopeid 0x0<global>
inet6 2001:4646:58b8:0:15bb:278d:a998:f4d prefixlen 128 scopeid 0x0<global>
inet6 2001:4646:58b8:0:d72d:2a87:de99:4f79 prefixlen 64 scopeid 0x0<global>
ether 74:c6:3b:7f:3c:e9 txqueuelen 1000 (Ethernet)
RX packets 78154 bytes 52156567 (52.1 MB)
RX errors 0 dropped 4424 overruns 0 frame 0
TX packets 32789 bytes 4744530 (4.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
