Intermittent connection issues loading/changing site- secure connection failed/site can't be reached

[EDIflyer]

Is anyone else occasionally getting a 'connection down' error from Chrome (or 'Secure Connection Failed' from Firefox) when changing page - if I hit refresh it works fine. At first I wondered if it was the site I was using but have noticed it on multiple different major websites over the past couple of months and not noticed it from other locations where I don't use Three Broadband so does seem to be related to the router/connection (this is via wired Ethernet too, so not a WiFi problem).  I've tried changing DNS server in case that helps but no difference.

It mainly seems to happen when trying to first load a site or (annoyingly) at checkout when a different site is being loaded as part of the checkout process.  It certainly doesn't happen everytime but does happen with reasonable frequency.  I've also noticed I often get it when trying to pull/push from/to Github too and have to do so a number of times for it to work (browsing the Github website works fine).

I'm using a NR5103E with Firmware Version V1.00(ACBJ.0)b14 - I tried rebooting it but to no effect.

[tucu]

I've switched the APN today to Manual mode and entered three.co.uk instead of 3internet. It's been 30 mins so far, and I've not encountered the issue again. Can anybody give that a try and report back please?

ps - speed is slower. there's more details from @JonathanB on this here: https://community.three.co.uk/t5/Network/Three-APN-Settings/m-p/5373

[AlSeek]

I've given this a go, switched back to 5G and manual APN of three.co.uk but soon experienced the issue on some of my usual websites so hasn't made any difference for me.

[EDIflyer]

I tried this previously but sadly it didn't solve the issue for me. 

[applepieman]

This issue has now been live for over a month can someone please explain what progress or discoveries have been made. I have some very annoying issues attached to this problem and so far this is hardly stellar service for paying customers. 

[MP]

After experiencing the PR_END_OF_FILE_ERROR consistently for several months, I have not encountered a single occurrence in the past few days. I will continue to monitor the situation, and it would be helpful to understand if any recent changes have contributed to the resolution of this issue.

[EDIflyer]

Sadly no change here, still lots of errors to Github this evening unless I use a VPN.

[hughesceri]

This has been happening to me intermittently when using github.com over the last couple of weeks / months too.

Not sure exactly how long as I've been running with 2 broadband providers but my other contract just lapsed so I'm now on 3 5G broadband 100% of the time.

It's happening quite a lot and like others on this thread, I'm concerned at how long it's taking to get a resolution.

I've just gone through the process of enabling adult content to see if that helps, but the intermittent SSL issues when accessing github.com are still there.

Is it helpful if I provide any details to your engineering team? Please let me know if it is.

[EDIflyer]

It's worth contacting the social media team and including this thread in your message saying you've been asked to get in touch so they can get your account details and send them to the technical team. 

[JonathanB]

Hey @hughesceri,

I'll PM you a link to the team that @EDIflyer mentioned. If you can chat with the team, they'll gather some info to get your connection info added to the investigation.

To view your private messages on the community, click on your avatar image in the top right of any community page, then "Messages".

Thanks,
Jonathan

[JonathanB]

Hey everyone,

Sorry for the delay in updates. The support teams on our side haven't been reproducing the issue, so it does seem to be quite elusive. We're still digging deeper into what could be the common link for those of you who are affected.

There's a few potential causes in terms of cached data, DNS settings, Firewalls, etc, here's a couple of guides/suggestions for related errors:

https://kinsta.com/knowledgebase/err_connection_closed/

https://kinsta.com/knowledgebase/pr-end-of-file-error/

Please feedback if any of the suggestions in the above articles help with this issue.

I'll let you all know as soon as we have any more to share on our side.

Thanks,
Jonathan