The HTML doesn’t contain clues as to where it originates from. --8<---------------cut here---------------start------------->8--- $ wget -qO- http://ci.guix.gnu.org | tail Attack Detected

Blocked because of DoS Attack

Your computer has been blocked because a DoS attack originating from your system was detected. For more information, contact the system administrator.

--8<---------------cut here---------------end--------------->8--- Some firewall-ish network equipment must be sitting right before our machine. It’s a problem because fetching narinfos and nars is likely to count as a “DoS attack”. Could it be some change at the MDC? Thanks, Ludo’.