Akamai blocks unordered HTTP request headers 9 years ago
This is just the configuration for a single site. The author did not even try it against www.akamai.com:
$ URL=http://www.akamai.com
$ UA="User-Agent: Mozilla/5.0 My API Client"
$ ACCEPT="Accept: /"
$ curl -v -H "$UA" -H "$ACCEPT" $URL
< HTTP/1.1 301 Moved Permanently
< Content-Length: 0
< Location: https://www.akamai.com
< Date: Tue, 02 May 2017 14:46:59 GMT
< Connection: keep-alive