Cannot access some websites after system update

I just updated my system for the first time in a few months, and now I cannot connect to some websites over my normal wifi network. I believe that it’s only IP4 addresses that I can’t connect to—for example, I can connect to google . com but not duckduckgo . com or github . com.

I think it has to do with my default gateway, but I am new to networking issues.

$nmcli device show wlp2s0
GENERAL.DEVICE:                         wlp2s0
GENERAL.TYPE:                           wifi
GENERAL.HWADDR:                         54:13:79:94:0D:21
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     95
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/8
IP4.GATEWAY:                            --
IP6.ADDRESS[1]:                         2604:3d08:9576:a9f0::56f/128
IP6.ADDRESS[2]:                         fe80::b13d:c188:4718:37ca/64
IP6.GATEWAY:                            fe80::fc77:7bff:fec7:6641
IP6.ROUTE[1]:                           dst = fe80::/64, nh = ::, mt = 1024
IP6.ROUTE[2]:                           dst = 2604:3d08:9576:a9f0::56f/128, nh = ::, mt = 600
IP6.ROUTE[3]:                           dst = ::/0, nh = fe80::fc77:7bff:fec7:6641, mt = 600
IP6.DNS[1]:                             2604:3d08:9576:a9f0:fc77:7bff:fec7:6641
IP6.DNS[2]:                             2001:4e8:0:4009::15
IP6.DNS[3]:                             2001:4e8:0:4007::1a
IP6.SEARCHES[1]:                        ht.home

I have no IP4.GATEWAY, and ip route has no output.
I can connect to my phone’s hotspot and access all websites fine, and I can use the wifi network without issue on a mac device.

I would appreciate any guidance!

My knowledge is limited too, but have you made sure that IP4 is enabled for this device?
(System Settings->Connections-> device name - “IP4” tab - Method: Automatic)

Check your /etc/hosts file for anything that shouldn’t be there.

cat /etc/hosts

Security note: Do not post output from this command.

For some reason your system is configure to use IPv6.

This is likely caused by disabling IPv4 in Network Manager.


According to the displayed log all the connections are made only via IPV6 .
No IPV4 addresses active .
So if the site has IPV6 addresses it will reply correctly.

Check the networkmanager if IPV4 is formally disabled …
If it is Active and IPV4 interface ( wlp2s0) is expecting an address from a DHCP server then check the WIFI network source.

Perhaps the DHCP server is unable to provide an new IPV4 address …

Thanks everyone! Not sure how my IP4 settings were changed (or why it only affected one network) but toggling the settings fixed it.


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