When I try access a website, and it is down, I head to http://www.downforeveryoneorjustme.com, and test it. But lately, my home network PCs cannot access facebook.com, and I tried the that service and the answer was:
It's just you. http://facebook.com is up.
Ok, that got me. I tried several browsers and 3 PCs in my LAN and it don't works. I don't know how to troubleshoot this. What some step-by-step to troubleshoot that problem?
Output from ping command:
Disparando facebook.com [18.104.22.168] com 32 bytes de dados: Resposta de 22.214.171.124: bytes=32 tempo=256ms TTL=245 Resposta de 126.96.36.199: bytes=32 tempo=255ms TTL=246 Resposta de 188.8.131.52: bytes=32 tempo=251ms TTL=245 Resposta de 184.108.40.206: bytes=32 tempo=255ms TTL=246
PS.: I thank you for the nice help, but then I suppose that the first step of a step-by-step to troubleshoot is ping from command line?