ceptro.br Centro de Estudos e Pesquisas em Tecnologia de Redes e Operações
CGI.br NIC.br

How does it work?

In order to verify the connectivity of a certain site, we dig under AAAA for the given url, if an IPv6 exists, we test the DNS connectivity and try to ping the server. All the tests are done by an API developed inside Ceptro.br.

In order to generate the thumbnails, we use a thumbnailer (websnap) available at Qt Graphics Dojo and a Frame Buffer (Xvfb) to run this on a server without X.