docker: Error response from daemon: Get https://registry-1.docker.io/v2/: proxyconnect tcp: EOF

Using a fresh Docker desktop (2.3.0.5) installation on Windows 10, I am not able to pull any image. I get this error :

docker: Error response from daemon: Get https://registry-1.docker.io/v2/: proxyconnect tcp: EOF

I am behind a corporate proxy, so I've tried configuring it :

with credentials, following http://domain\username:[email protected]:port format
like above, but with special characters encoded : https://www.url-encode-decode.com/
without credentials
with http/https
without http/https

but nothing seems to work..

There's really not much help in the logs : what else can I try ?

Solution

Since we can configure a proxy for http and https, I had put what I thought was the proper value for each, ie :

http://domain\username:[email protected]:port
https://domain\username:[email protected]:port

(with special characters in the password URL encoded with https://www.url-encode-decode.com/ )

but it wasn't working.. I tried putting the http string for both http and https, and it worked ! (I guess the corporate proxy doesn't support https internally)