$ wget --debug http://www.cpan.org/authors/01mailrc.txt.gz >foo.gz
DEBUG output created by Wget 1.19.1 on linux-gnu.

Reading HSTS entries from /home/web/.wget-hsts
URI encoding = ‘UTF-8’
Converted file name '01mailrc.txt.gz' (UTF-8) -> '01mailrc.txt.gz' (UTF-8)
--2018-03-01 11:02:48--  http://www.cpan.org/authors/01mailrc.txt.gz
Resolving www.cpan.org (www.cpan.org)... 151.101.194.49, 151.101.130.49, 151.101.66.49, ...
Caching www.cpan.org => 151.101.194.49 151.101.130.49 151.101.66.49 151.101.2.49 2a04:4e42:600::561 2a04:4e42:400::561 2a04:4e42:200::561 2a04:4e42::561
Connecting to www.cpan.org (www.cpan.org)|151.101.194.49|:80... connected.
Created socket 3.
Releasing 0x00005625bd526e10 (new refcount 1).

---request begin---
GET /authors/01mailrc.txt.gz HTTP/1.1
User-Agent: Wget/1.19.1 (linux-gnu)
Accept: */*
Accept-Encoding: identity
Host: www.cpan.org
Connection: Keep-Alive

---request end---
HTTP request sent, awaiting response... 
---response begin---
HTTP/1.0 403 Forbidden: header 'Content-Type' value denied
Content-type: text/html; charset="iso-8859-1"

---response end---
403 Forbidden: header 'Content-Type' value denied
Registered socket 3 for persistent reuse.
URI content encoding = ‘"iso-8859-1"’
] done.
2018-03-01 11:02:48 ERROR 403: Forbidden: header 'Content-Type' value denied.