Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease Cannot initiate the connection to dl.google.com:80

Question

Under Ubuntu 20.04, I am getting the oft-reported

Err:10 http://dl.google.com/linux/chrome/deb stable InRelease                   
  Cannot initiate the connection to dl.google.com:80 (2800:3f0:4002:802::200e). - connect (101: Network is unreachable) Could not connect to dl.google.com:80 (172.217.172.78), connection timed out
Reading package lists... Done                             
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease  Cannot initiate the connection to dl.google.com:80 (2800:3f0:4002:802::200e). - connect (101: Network is unreachable) Could not connect to dl.google.com:80 (172.217.172.78), connection timed out
W: Some index files failed to download. They have been ignored, or old ones used instead.

The usual solution does not apply, since I already configured for 64-bit chrome:

$ cat /etc/apt/sources.list.d/google-chrome.list
### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out this entry, but any other modifications may be lost.
deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main

I thought perhaps I had wrong keys, so I tried (ref)

$ curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:00:11 --:--:--     0
curl: (7) Failed to connect to packages.cloud.google.com port 443: Connection timed out
gpg: no valid OpenPGP data found.

This is the only repo failing. I didn't find other potential causes of the problem/solutions.

How can I solve this?

Answer 1

Apparently (and strangely, for me), the culprit was a filter in my router for URL http://www.youtube.com.