topic Re: ERR_SSL_VERSION_OR_CIPHER_MISMATCH in Everything else

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

eco589 — Thu, 30 May 2024 15:30:50 GMT

The connection for this site is not secure

secure.transaveuk.co.uk uses an unsupported protocol.

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

The error above has been noted on the forums previously for youtube and also plusnet, perhaps others as well. When phoning plusnet they are unfortunately remarkably unhelpful. The reality is that when using a different wifi, or my mobile phone hotspot the error doesn't occur. It also doesn't occur when using my work laptop because of a VPN (I guess!). Anyway, can someone kindly look into this and fix it for me.

Re: ERR_SSL_VERSION_OR_CIPHER_MISMATCH

pjmarsh — Thu, 30 May 2024 15:49:55 GMT

If I remember correctly, the issue with this happening on the plus.net website was because of the certificate used on their webservers, and a change that had been made to the default settings in Google Chrome, so if it is the same thing then it is not something that Plusnet could fix.

From having a quick look at their certificate (and memories of the discussion when it was happening with Plusnet), then it could be the same issue. Part of their certificate chain uses SHA1, which is what Chrome was blocking if I remember correctly:

If what I suspect is correct, then the only people who can fix it are whoever look after the transaveuk.co.uk website.

Re: ERR_SSL_VERSION_OR_CIPHER_MISMATCH

eco589 — Thu, 30 May 2024 16:52:23 GMT

Thanks, but why does it work on

a) my other work pc (with a VPN)

b) when I change my wifi to my hotspot on my phone.

Both of the above suggest at least it is a plusnet issue doesn't it?

Re: ERR_SSL_VERSION_OR_CIPHER_MISMATCH

pjmarsh — Thu, 30 May 2024 20:14:11 GMT

So the other times you've tried are with different devices?

If I remember correctly, when this was being reported by people about plus.net, it was only when using Chrome as the browser, where an update had changed one of the settings to not support SHA1 (due to it being old and significantly less secure).

Re: ERR_SSL_VERSION_OR_CIPHER_MISMATCH

eco589 — Thu, 30 May 2024 20:16:19 GMT

Not always, if I use the same device but use change my internet connection it works fine. hence it must be plusnet, in my view.

Re: ERR_SSL_VERSION_OR_CIPHER_MISMATCH

RealAleMadrid — Thu, 30 May 2024 21:51:39 GMT

@eco589 What browser are you using? The site loads correctly for me on a Plusnet connection on Windows 10 with MS Edge.