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.

[EDIflyer]

100% not fixed - I actually thought it was getting better but has just got a whole lot worse over the past few days for me, especially to Github.

@JonathanB can we please have a detailed update as to what exactly is happening here?

[hughesceri]

Still failing consistently for me at 7.30 am 😞

[seangb1989]

An example of the RST packet in question

Started getting errors again. Anyway here are the RST packets. Don't seem to get them on my BT connection. I assume these are the problem, maybe?

[seangb1989]

I am really sick of this as well. I've spent half of my day looking into this problem playing around with TLS 1.2/1.3 up/downgrading ciphers etc and it seems to be an issue with RST packets looking at wireshark.

I've blocked the RST packets on MacOS and it didn't seem to help much.

[hughesceri]

I have to report that things are getting worse for me. Some of my internet banking applications can now take a couple of attempts to log in. I'm also seeing issues on my smart TV - iPlayer occasionally hangs while logging in, and any apps that stream adverts (ITVX and Channel4 are particularly bad) have a long delay on each advert whenever ad breaks happen.

Can we get a meaningful update please? “We're looking into this” is no longer acceptable. It feels like a lot of people have been very patient and considerate when reporting this issue and we've been pretty much ignored as a result. 

For those of us that have given you access to our accounts, have you been able to isolate our usage and see the errors we're seeing? Is there a way to monitor our access “live” so that you can see the traffic we're generating and any errors resulting from that? Many of us have offered to help in this way but I have never been contacted.

I'm still tied in to your service for another 4 months and it's becoming unfit for purpose. What options do I have to terminate early without penalty?

[EDIflyer]

Agree things have definitely got worse.  I found things were working fairly well over the past few weeks but today have notice a LOT more by way of the usual errors.  

@JonathanB please can we get a proper update?

[applepieman]

So it would seem Three have decided to simply ignore this issue and let paying customers continue with sub-standard service. Always good to note the service you recive as a customer and pass this on.

[AlSeek]

Any updates @JonathanB ?
I'm still experiencing this as an ongoing issue.

It seems overnight my NR5103E router received a firmware update to V1.00(ACBJ.0)b15. It hasn't made any difference to his issue but it did seem to break my wifi and required a factory reset and reconfiguration to get wifi working again.

[usernamefor3]

I've long been experiencing this issue on my 5G home broadband when using the 3internet APN. As with others, the three.co.uk APN seems to work fine but one of the reasons I use Three is the dedicated IP not behind CGNAT. I'm getting SSL related errors displayed, generally "PR_END_OF_FILE_ERROR" in firefox. I'm on IPv4.

As with others, happy to give details of the mast I'm connecting to etc if it will help.

[JonathanB]

Hey everyone,

I do appreciate the frustration and that there's been delays in any significant updates. We're still chasing the relevant teams, but it's proving a complicated issue. I have removed the link to the Social Media Team from the thread, just simply as they are quite a small team, so it's best for me to ensure that they're being contacted about relevant issues, so we don't generally leave it on public threads.

I'm happy to share this on PM though, if anyone doesn't have it that's affected by the issue, please drop me a PM from my profile page @JonathanB 

It doesn't appear to be a universal issue across the Three network, so we're still trying to figure out the variables involved, but we're working to progress this.

Thanks again for your patience everyone,
Jonathan