$ curl -i [1]defcon.org:443
   HTTP/1.0 503 Service Unavailable
   ...

   On Wed, Apr 1, 2015 at 1:18 PM, Georgi Guninski
   <[2]guninski@guninski.com> wrote:

   On Wed, Apr 01, 2015 at 02:57:05PM +0300, Georgi Guninski wrote:
   > As of Wed Apr  1 11:54:42 UTC 2015 can't browse:
   > [3]https://www.defcon.org/html/links/dc-transparency.html
   >
   > Other people can't too.
   >
   > Is it only us?

     $ openssl s_client -connect [4]www.defcon.org:443
     CONNECTED(00000003)
     19658:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake
     failure:s23_lib.c:188
     from at least 2 distinct IPs.

References

   1. http://defcon.org:443/
   2. mailto:guninski@guninski.com
   3. https://www.defcon.org/html/links/dc-transparency.html
   4. http://www.defcon.org:443/