UKC

UKC reporting this on Android/Chrome, starting this afternoon.

NET::ERR_CERT_AUTHORITY_INVALID

Anyone else seeing this?

Are you on O2 mobile rather than WiFi or wired?

I think it was a O2 dns issue.

WiFi. Airplane mode, so no chance of being on a mobile network.

Your own WiFi or a public/corporate network? The network might be trying to redirect you to a login page and accidentally breaking the secure connection.

Home network.

It's come back, though; Chrome did say, essentially, "try again later"...

I've been getting it for a couple of weeks when coming to forums through UKH which is the normal way for me.

So far the workaround for me has been to get to the forums through UKC.

oh, it's back again... was fine earlier this morning.

Is this just on UKC or UKH too?

click through to the advanced option to view certificate.  it should have an identifier that might tell you who is intercepting your traffic.

I've been getting the problem intermittently on UKH for two weeks or so.

If I searched for UKC and went to the same pages via that route I wasn't getting the error until about the time this thread was posted but after that it has been happening to me on and off on both UKH and UKC.

Been fine on both for me last night and today.

I'm also using Chrome on Android, doesn't make a difference whether using mobile data or home wifi.

Seems to have stopped being a problem...

I don't access via UKH, so can't tell if that has been doing the same.

I did wonder if there was some timestamp involved, as it seemed to be okay early morning, fail during the day, then recover in the evening 

Think I did that, but don't recall seeing an obvious ID.

Here's my view with the good cert. What does the "issued by" say when you get the error?

What the error indicates is the SSL cert want issued by a trusted party.  The name of that party (which in this case is going to be self assigned) is the interesting bit.

Can't tell you, as it's not happened for a couple of days. I'll look out for it if it happens again.

Ironically, given your username, this can be an indication that your HTTPS connection is being intercepted  / proxied / man-in-the-middled.  Probably GCHQ.

Oh dear, did I say something beastly about Bowis...?

Famous last words; just did it again. But nothing useful under 'advanced'.

Something about ukclimbing.com using HSTS.

Take a screen shot next time.

There's usually someone interesting in there even if you don't recognize it at first.

If you can find something interesting in this...

I did select both images...

Most likely an issue at your end, or your ISPs.  Likely culprits:  browser plug ins, VPNs, novel home network equipment, router etc, ISP interference.

No plugins on this platform

Not using a VPN

Nothing novel. No recent changes.

Since I have no problem accessing via PC on the same network, I suspect that means it's nothing to do with my ISP, either.

So I guess it's summit else...