$ telnet lurkmore.to 80
Trying 85.17.124.181...
Connected to lurkmore.to.
Escape character is '^]'.
GET / HTTP/1.1
Host: lurkmore.to
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Firefox/24.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
HTTP/1.1 418
Server: nginx
Date: Fri, 03 Oct 2014 12:11:27 GMT
Content-Length: 0
Connection: keep-alive
Connection closed by foreign host.
$
mfw HTTP 418 I'm a teapot