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 will post a link to the new/other location of this issue 
:
https://forums.comodo.com/secure-dns-help-cis/report-blocked-sites-you-believe-are-safe-here-t68875.0.html;msg509873#msg509873