Why can't I access Facebook or Youtube with my Mac?

[Venezia]

I'm using a MacBook Pro connected to Ethernet at home. The only two website i can't have access is Youtube and Facebook. If i connect to the same Ethernet with the same cable to my other laptop (which is a Dell) I have access without any problem. Why is this happening?
(I'm in Spain, btw, there's no censorship on these two sites)

[SilverTonguedDevil]

This is entirely a software question, so "MacBook Pro" means nothing for this issue. The OS version is vital to the question.

Did you buy this MacBook Pro new? When? What version of OS? Waiting your "DETAILS"....

EDIT:
Maybe you went away on a trip.
Do this....
– Load this page: http://cheeseglobe.com
and click the "Youtube" link on that page. Does it load?

"Yes" Then you are mistaken about the censorship. It could be a short term blocking in response to some anti-Spain video on Youtube.

"No" Then go to the top menu bar, click Go" > Go to Folder.
Type:
/etc
and click "Go". Find a file called "hosts" (no extension). Right-click it and choose to open with TextEdit. Read the text details and see if it has anything about Youtube or Facebook. If not, try Firefox.

HOPE THIS HELPS!!!!
GOOD LUCK!!!!
HAVE A NICE DAY!!!!

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