I assume that you have all discovered that the problem is now resolved.   I had the problem as well, and over the course of a few days I exchanged emails with someone from PayPal who actually cared. I sent him screenshots of the problem happening (even from my phone). It had been nagging at me that I had recently found some settings in my Comcast account regarding my router, and I had changed one of them. "Protected Browsing". It described that protected rousing was great for you against malware and all kinds of other bad things, and it seemed like a good idea to turn it on. So I enabled it. That's when my problem with PayPal began. But it took me a while to realize it. Once I remembered where I had made a setting change, after the days of exchanging emails with the fellow from PayPal, I went to my Comcast account settings and disabled "Protected Browsing".   Go to my.xfinity.com.   Along the top there are menu items (My Xfinity, Shop/Upgrade, Support, My Account), then there are icons. Email, TV, Home, Internet (looks like Wi-Fi), phone, etc. Click the Internet/Wi-Fi icon. You may be asked to sign in along the way.   There is now a 2nd level of menus. Overview, People, Devices, Help, More. Click More.   Scroll down to see Security Settings. All your problems lie with "Protected Browsing". When enabled, it caused the problems with PayPal. The fellow from PayPal called me this evening and asked me to verify that when the setting is enabled that I am now able to reach PayPal.com. It's true, I can.   So it appears that the offending problem has been resolved. Comcast had put out a patch prior to the fellow's phone call and he was calling to ensure that the patch had worked.   So I assume everybody's problem is solved. If not, you might try rebooting the router now that the patch is available. Otherwise, you could just disable that setting, but I'm leaving it on. Now that it allows PayPal, it can go ahead and keep blocking whatever else it's blocking as far as I'm concerned. ... View more