Strange problem started happening on my home network. Have 2 imacs running OS X 10.5.
One of them suddenly will not open some HTTPS sites like one of my email sites. I can open this email as well as all other HTTPS on the other imac on the same network. My ISP is Xfinity/Comcast. i tried connecting by ethernet to the Xfinity Gateway and still no access. I tried creating a wireless Hotspot using a different ISP (Verizon) and Viola! I can connect. I go back to the Comcast wireless connection and no connection again. This is happening on both browsers on this computer. Tried clearing DNS via Terminal. Tries swapping out the Gateway (though only one mac is affected. still same issue). So something with just this mac and Xfinity? Xfinity cannot figure since it works on the other mac.