Dan is on leave for a couple of weeks and it looks like his question to Networks hasn't been answered yet, just touching base if you're still having issues accessing websites?
I read through all the replies and much of it is gobbledygook! So, I am sharing this information based on my personal experience and hopefully, may help others who have experienced the same. Also, an opportunity to remind Optus that they should have fixed this problem.
I operate three website on a full subscription at WEEBLY.COM. Until two weeks ago, I could open all three websites on ANY browser (safari, chrome, firefox) on any device at HOME on Optus NBN IP address and DNS (PC, MAC, mobile phone, iPAD). Suddenly I was unable to do so. Each browser would simply time-out. The message that came up on the brwoser is
‘This site can’t be reached, Server IP address could not be found. DNS_PROBE_FINISHED_NXDOMAIN’
Fortunately for me, someone through the Community Forum at Weebly. com resolved the matter (Weebly customer support, like Optus, were unable to do so). This was his response:
'There is some kind of issue for people using Optus where custom domains are not resolving for them. We're not sure whether Optus blocking register.com (our Registrar who supplies the nameservers that domains registered through us use), or if it's some other kind of network issue between register.com and Optus. We've reached out to Register.com so they can look into the issue, and from what I saw on Optus's forums it looks like they're also looking into it.'
Anyway, I googled and the information I found was to change the Optus DNS by entering the following:
It now works perfectly. So if you have experienced same or similar, change your DNS to the above. Because clearly, no one at Optus had any clue!
Are you saying the solution was to change your device/PC's DNS settings?
If that's what you're saying the problem is not solved, as you can't ask every customer/user of a website to change their DNS settings....