Its the webserver 

$ wget cpan.org
--2019-11-21 15:50:25--  http://cpan.org/
Resolving cpan.org... 147.75.38.240
Connecting to cpan.org|147.75.38.240|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://cpan.org/ [following]
--2019-11-21 15:50:25--  https://cpan.org/
Connecting to cpan.org|147.75.38.240|:443... connected.
....

[download]

In reply to Re: HSTS policy breaks cpan utility on Windows by Anonymous Monk
in thread HSTS policy breaks cpan utility on Windows by syphilis

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