I have a really frustrating problem and I was wondering if someone has had a similar problem and resolved it. Basically, starting yesterday, some websites won't open - but only some - and there seems to be no logical pattern. For example I can open news site msnbc.msn.com/ but not abcnews.go.com/ I can open apple.com, but not sun.com/ (Sun Microsystems). Some Mac forms I can open (like this one) and others I can't... I have to go to Google's cache and then click view text only version.
Here are the facts:
1) Same issue present in all browsers (Firefox, Camino, Safari)
2) Able to access ALL sites via proxy server
3) Some of the sites I can't open, I can ping fine. Others I can neither ping nor open, and then there is the oddest category of all - some sites that I CAN open in the browser fine, but I can't ping.
4) All worked fine previously - everything just changed in an instant.
5) Haven´t installed any applications (that I'm aware of) so I don't think it's a virus.
6) Running OSX 10.5.8
Here is what hasn't worked:
Cleared cache on all the browsers and deleted all cookies
Updated all Mac software
Turned off TCP Window Scaling
Here's what I haven't tried, but read elsewhere that it hasn't worked in the few older cases I found of this (2008 and before):
Reinstall OS / Browsers
Check for Spyware
Disable firewall
Any ideas what could be causing this? ISP issue? Mac virus? Firewall? Networking issue?
Is this even a Mac problem?
Whatever it is, it's unbelievably frustrating and any help would be SUPER appreciated.
Here are the facts:
1) Same issue present in all browsers (Firefox, Camino, Safari)
2) Able to access ALL sites via proxy server
3) Some of the sites I can't open, I can ping fine. Others I can neither ping nor open, and then there is the oddest category of all - some sites that I CAN open in the browser fine, but I can't ping.
4) All worked fine previously - everything just changed in an instant.
5) Haven´t installed any applications (that I'm aware of) so I don't think it's a virus.
6) Running OSX 10.5.8
Here is what hasn't worked:
Cleared cache on all the browsers and deleted all cookies
Updated all Mac software
Turned off TCP Window Scaling
Here's what I haven't tried, but read elsewhere that it hasn't worked in the few older cases I found of this (2008 and before):
Reinstall OS / Browsers
Check for Spyware
Disable firewall
Any ideas what could be causing this? ISP issue? Mac virus? Firewall? Networking issue?
Is this even a Mac problem?
Whatever it is, it's unbelievably frustrating and any help would be SUPER appreciated.