Been in website development for 8 years and this one has me stumped. I have an intermediate knowledge of system, routers, DNS servers and all that jazz.
Back story - I own http://www.aussiecoeliac.com.au, earlier this morning I posted to it successfully, everything went through and then suddenly the connection timed out. The connection timed out and won't load on my PC or devices.
Check all other websites and everything else works fine. Contact Crazy Domains IT support (host server), they say that everything is all good on their end. Get multiple friends to test the link and sure enough it's working for them. When I take my phone off the home wifi the website loads fine. It won't work on any device connected to the wifi, no matter the browser.
I clear the cache. I restart devices. Turn the modem off and on. This fixes the problem for 5 seconds but I can't save any changes before it times out again. I test it on a proxy site works fine. Flush my DNS no changes, still no website loading. Connect to an Open DNS, no changes still won't load. Restart again and still no change. Uninstall the browser software and do a fresh install. Still no change. Try to reset my hosts file in SYSTEM32, no change.
I am running Windows 10. ISP - Optus. My dad also with Optus has confirmed the website works for him.
I checked with crazy domains again and I haven't been blacklisted on their end.
Never had to come up against anything like this. Anyone have any suggestions? Next idea is to bypass the router to check if that firewall is blocking me but since it is midnight I am heading to bed first.