ConfigServer Community Forum

It looks like the old BOGON blocklist is dead:
http://www.cymru.com/Documents/bogon-bn-agg.txt

Everything is switched over to new locations depending on what you want to grab
See for reference:
http://www.team-cymru.org/bogon-reference-http.html

Looks like the issue might be on their end as the new locations throw a 404 also.

I contacted them and they have corrected the links.