Since today, I cannot access some website through the browser or by pinging it in the terminal while others remain accessible. I am on ubuntu 20.04 and i haven't done any network settings change or what so ever.
For instance www.google.com or www.youtube.com are accessible but www.github.com or www.askubuntu.com aren't.
ping youtube VS github
As you can see , YouTube.com is pinging correctly but GitHub throws
ping : connect : Network is unreachable
I am also adding the content of systemd.conf:
If that helps :
the systemd.conf content
` GNU nano 4.8 /etc/systemd/resolved.conf
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See resolved.conf(5) for details
[Resolve]
#DNS=
#FallbackDNS=
#Domains=
#LLMNR=no
#MulticastDNS=no
#DNSSEC=no
#DNSOverTLS=no
#Cache=no-negative
#DNSStubListener=yes
#ReadEtcHosts=yes`
What I get if I run sudo apt-get update
Err:1 http://de.archive.ubuntu.com/ubuntu focal InRelease
Could not resolve 'de.archive.ubuntu.com'
Hit:2 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu focal InRelease
Hit:3 http://security.ubuntu.com/ubuntu focal-security InRelease
Err:4 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease
Could not resolve 'de.archive.ubuntu.com'
Hit:5 http://ppa.launchpad.net/team-xbmc/ppa/ubuntu focal InRelease
Err:6 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease
Could not resolve 'de.archive.ubuntu.com'
Hit:7 http://ppa.launchpad.net/thierry-f/fork-michael-gruz/ubuntu focal InRelease
Reading package lists... Done
W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/focal/InRelease Could not resolve 'de.archive.ubuntu.com'
W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease Could not resolve 'de.archive.ubuntu.com'
W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/focal-backports/InRelease Could not resolve 'de.archive.ubuntu.com'
W: Some index files failed to download. They have been ignored, or old ones used instead.
I have seen that for some similar issues the ouput of tracepath can be relevant therefore I add here too ():
tracepath google.com
1?: [LOCALHOST] 0.030ms pmtu 1500
1: 2a02:8071:aeb:8200:7254:25ff:fe58:f20b 7.085ms
1: 2a02:8071:aeb:8200:7254:25ff:fe58:f20b 6.447ms
2: 2a02:8071:a00::1 24.160ms
3: 2a02:8071:ff:37c0::1 20.167ms
4: de-str01c-rc1-lo0-0.v6.aorta.net 20.573ms asymm 5
5: de-fra04d-rc1-lo0-0.v6.aorta.net 19.275ms
6: no reply
7: no reply
8: no reply
9: no reply
10: no reply
tracepath github.com
1: send failed
Resume: pmtu 65535
tracepath ebay.com
1: send failed
Resume: pmtu 65535
tracepath youtube.com
1?: [LOCALHOST] 0.015ms pmtu 1500
1: 2a02:8071:aeb:8200:7254:25ff:fe58:f20b 13.594ms
1: 2a02:8071:aeb:8200:7254:25ff:fe58:f20b 9.654ms
2: 2a02:8071:a00::1 412.341ms
3: 2a02:8071:ff:37c0::1 17.899ms
4: de-str01c-rc1-lo0-0.v6.aorta.net 21.356ms asymm 5
5: de-fra01b-rc2-lo0-0.v6.aorta.net 24.844ms
6: no reply
7: no reply
8: no reply
ping ebay.com
ping: connect: Network is unreachable
ping github.com
ping: connect: Network is unreachable
ping youtube.com
PING youtube.com(fra07s30-in-x200e.1e100.net (2a00:1450:4001:803::200e)) 56 data bytes
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=1 ttl=115 time=41.1 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=2 ttl=115 time=57.1 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=3 ttl=115 time=26.9 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=4 ttl=115 time=22.2 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=5 ttl=115 time=24.7 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=6 ttl=115 time=31.0 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=7 ttl=115 time=28.9 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=8 ttl=115 time=25.7 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=9 ttl=115 time=24.4 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=10 ttl=115 time=74.2 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=11 ttl=115 time=78.4 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=12 ttl=115 time=74.9 ms
64 bytes from fra24s02-in-x0e.1e100.net (2a00:1450:4001:803::200e): icmp_seq=13 ttl=115 time=25.9 ms
^C
--- youtube.com ping statistics ---
13 packets transmitted, 13 received, 0% packet loss, time 12018ms
rtt min/avg/max/mdev = 22.158/41.177/78.385/20.963 ms
I also looked up the results of nslookup
nslookup google.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: google.com
Address: 142.250.186.46
Name: google.com
Address: 2a00:1450:4001:801::200e
nslookup github.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: github.com
Address: 140.82.121.4
The IP adress from github is indeed leading to github.com if i try on another system. therefore probably a DNS problem. But sofar didn't manage to solve it
Any idea how to solve this?
Thanks
I have managed to solve partially the problem.
As long as I am connected directly to the main router everything works fine but as soon as I am connected to a wifi repeater the connection problems start. The conection to a repeater was till the last 24 h not a problem.
If anyone has a solution for this problem I would be more than happy to take it.
