Headers of https://paavo.dyndns.org/

HTTP/1.1 401 Unauthorized
Content-Type
text/html
Server
Microsoft-IIS/8.0
WWW-Authenticate
Negotiate
WWW-Authenticate
NTLM
Strict-Transport-Security
max-age=31536000
Date
Mon, 28 Apr 2014 06:17:12 GMT
Connection
close
Content-Length
1293