cant access certain websites

i have a imac g5 and my brother uses a pc, we both share broadband via a netgear router. The problem is that i am unable to access certain websites like ebay, hotmail and aol for strange reasons.. can any one help please?

are you using safari? if so, go into safaris prefs, undersecurity, make sure youre accepting cookies. also, try emptying safaris cache.

i tried using safari and internet explorer still no good. did what u said still did not help.. any other ideas?

I have this exact same problem. When at home, I cannot access all sites or use msn messenger etc on wireless network using D-link router, however at my uni house using a linksys router there is no probs at all!