I'm hoping that this is something obvious, but frankly it's a little puzzling for me. This is a server I set up last month, and now that it's time to expand the library of Perl modules, I'm having an unexpected error from cpan:

$sudo cpan install LWP::UserAgent
Loading internal null logger. Install Log::Log4perl for logging messag
+es
Reading '/home/web/.cpan/Metadata'
  Database was generated on Mon, 05 Feb 2018 20:17:03 GMT
Fetching with HTTP::Tiny:
http://www.cpan.org/authors/01mailrc.txt.gz
HTTP::Tiny failed with code[403] message[Forbidden: header 'Content-Ty
+pe' value denied]

Trying with
    /usr/bin/wget -O "/home/web/.cpan/sources/authors/01mailrc.txt.gz.
+tmp16849"
to get
    http://www.cpan.org/authors/01mailrc.txt.gz
--2018-03-01 10:37:25--  http://www.cpan.org/authors/01mailrc.txt.gz
Resolving www.cpan.org (www.cpan.org)... 151.101.194.49, 151.101.130.4
+9, 151.101.66.49, ...
Connecting to www.cpan.org (www.cpan.org)|151.101.194.49|:80... connec
+ted.
HTTP request sent, awaiting response... 403 Forbidden: header 'Content
+-Type' value denied
2018-03-01 10:37:25 ERROR 403: Forbidden: header 'Content-Type' value 
+denied.


    Function system("/usr/bin/wget -O "/home/web/.cpan/sources/authors
+/01mailrc.txt.gz.tmp16849" "http://www.cpan.org/authors/01mailrc.txt.
+gz" ")
    returned status 8 (wstat 2048), left
/home/web/.cpan/sources/authors/01mailrc.txt.gz.tmp16849 with size 0
    Warning: no success downloading '/home/web/.cpan/sources/authors/0
+1mailrc.txt.gz.tmp16849'. Giving up on it.
[download]

If I try just doing a wget on the file, I get pretty much the same thing:

$ 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' (UT
+F-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, 151.101.130.4
+9, 151.101.66.49, ...
Caching www.cpan.org => 151.101.194.49 151.101.130.49 151.101.66.49 15
+1.101.2.49 2a04:4e42:600::561 2a04:4e42:400::561 2a04:4e42:200::561 2
+a04:4e42::561
Connecting to www.cpan.org (www.cpan.org)|151.101.194.49|:80... connec
+ted.
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.
[download]

It seems like it's trying to use a content type of text/html to get a zip file -- which is obviously wrong. But this is a new server, without any weird fancy configuration. Can someone suggest something? Thanks.

Update at 1158 ET: It seems there might be a host problem:

Err:4 http://ca.archive.ubuntu.com/ubuntu artful/main amd64 perl-opens
+sl-defaults amd64 3
  403  Forbidden: header 'Content-Type' value denied [IP: 91.189.88.15
+2 80]
Err:5 http://ca.archive.ubuntu.com/ubuntu artful/universe amd64 libcry
+pt-ssleay-perl amd64 0.73.04-2build1
  403  Forbidden: header 'Content-Type' value denied [IP: 91.189.88.15
+2 80]
[download]

I wonder if this host is mis-configured.