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Yes Iain, I have the same B525s-65a modem/router.
Apart from your thread and mine, I suppose you have also seen the other threads:
"Cant access optus websites from optus mobile broadband"
"Unable to open Help and Support or Yes Crowd pages with Apple devices".
So that makes at least four threads with this exact same problem that Optus has no real interest in.
Today I put the SIM from my phone (non Optus) in my B525 and it is working perfectly, using it to make this post
So this does suggest the issue is with the either the account configuration or the SIM.
G'day Iain, yep, after reading your post I tried the same thing.
I put a Telstra SIM in the B525 and no worries, opened Optus pages without a problem.
After putting the Optus SIM back in, back to the same old problem - Optus.com.au Home page loads, but most optus.com.au links, MyAccount pages and Yes Crowd pages don't load. Had to hotspot my Telstra phone to post this.
So nothing wrong with the B525 modem/router or any of my Apple and Mac devices.
Must be the SIM card or something else.
What was the change they made, I've contacted Optus twice about this error on my new home wireless broadband connection today and they're trying to claim it's a new problem and they have no settings at their end that will help, and it's getting on to 12 months later.
Do you have a 5G Fixed Broadband service?
No, they didn't elaborate as to what was needed to fix the issue. However once the change was implemented it resolved the issue with multiple devices I was had tested with. I was able to reproduce the issue using a repeatable curl command (that worked when using dsl but not 4g) and had investigated extensively before raising the issue with support.
Thanks for confirming.
That's interesting as there is a known issue with 5G but not with 4G that I have heard.
Thanks JohnathanM for returning to let us know, it does sound like you do need to get in contact with Optus technical support. Refer them to this thread if needed.
I have been in contact, and they gave me a bit of a runaround telling me if other websites worked, then it wasn't a problem with the internet (which is obviously rubbish, as JonathanM has clearly documented - great job Johnathan and thanks - and I've confirmed as the same issue here), but then told me they'd escalate to the network team and someone would call me back within 2 hours, and they haven't as of yet (about 5 hours later now). Given JonathanM reported the issue February of last year, it's pretty worrying that the problem is recurring and that the cause and remedy hasn't been made available online, by optus, in forums such as here or whirlpool.
Do you have any suggestions for how I might get through to someone more appropriate than 1st level "turn it off and on" tech support? I'm suspicious but have no proof that the 'call back' offer was just an excuse to get me off the line and resolve his call for some internal QA process.
Happy to help ehybrid.
When I had the issue it took me hours of testing before I was convinced it was an issue upstream of my equipment.
My issue was due to larger 1508 byte packets when negotiation https connections being dropped for some hosts.
In my case, I used this command (it was mashed above) to test and it only failed when running over the optus 4g network:
curl -vo/dev/null '/html/assets/icomoon.ttf'
It's an asset that's included on the yescrowd site that wasn't working when I had my issue.
However can't be sure that's your issue as well however, could be a totally different problem your having. Best of luck.