Certain Websites don't load on MAC

Hi,

I am new to this forum, and I am glad I've found it .
My main issue is with my Imac which was bought in 2011 october model.
I have parallels on it, so I run windows and mac os at the same time on it.
I started to have a problem on my Mac OS with browsers not being able to load certain websites, some websites work, some do not. On windows though I have no problems visiting the websites which are blocked on MAC OS..
To me it is very strange, and I can't seem to find a way to fix it.
Help appreciate it

If you can access those websites from Windows, then they're not being blocked by your ISP or anyone else. Check to see what you're using for DNS servers from System Preferences, Network, WiFi, Advanced, DNS tab.

My experience working with both Windows and OS X, is that Windows handles networking better than OS X. DNS problems are more likely to occur in OS X than Windows.

chscag said:

If you can access those websites from Windows, then they're not being blocked by your ISP or anyone else. Check to see what you're using for DNS servers from System Preferences, Network, WiFi, Advanced, DNS tab.

My experience working with both Windows and OS X, is that Windows handles networking better than OS X. DNS problems are more likely to occur in OS X than Windows.

Click to expand...

http://postimage.org/image/ccvnu36n1/ image of what is my dns

What you are seeing in the DNS window is the URL address for your web browser. Ask your ISP for the primary and secondary DNS addresses, hit the little + button and add them.

You could use the OpenDNS severs. These are
208.67.222.222
208.67.220.220

Thank you all for your help.
it seems, everything got fixed by itself, I didn't even have to restart, I just left computer running for a night and the next day everything worked when it left sleeping mode.
I think problem was related to ISP.
if it happens, again, I'll try these 2 addresses posted by docx

use them anyway. I've never had a problem using it.