Comodo DNS has blocked all websites of www.xpg.com.br
(brazilian free hosting).
xxxxxx.xpg.com.br (all blocked)
Perhaps a site created by this service has been used to distribute malware, but ... block all sites - including his own portal - is a big mistake.
Many people ask me for help to disable Comodo DNS because of that fact.
(I posted before in another topic because I only saw this topic now.)