1214C https issues

Hi.

Any help would be appreciated

You post in the German speaking part of the forum.

On Monday the moderator would move your topic to the English speaking part of the forum.

Hi.

Thanks for the information.

Unfortunately I haven't been able to sort the issue.

When I query HSTS/PKP for 10.1.2.10 it gives me a not found response.

I am unable to change the security certificate as it is served by the 1214C PLC.

Is there any way to force Chrome to show the advanced option of proceeding to an insecure website?

All that is displayed is the https error screen with no advanced options ( see attached pic )

Hi lapgoch,

maybe your issue is related to the used TLS version. As far as I remember, your PLC is not supporting TLS 1.2. When using Google Chrome (ore Microsoft Edge) you can try to use the Security panel inside the Chrome DevTools to figure out the security settings.

Kind regards
Stefan

Hi.

Thanks for your help'

Unfortunately when it fails to connect , the 1214C plc serves up a login form error webpage.

This is a http webpage and doesn't show any info about security when I inspect it.

Hi lapgoch,

then let's try it the different way. Please enable TLS 1.1 and also TLS 1.0 on Internet Options in your Windows operating system or when using Firefox in Firefox itself. The description from DigiCert should help you (even thought it for enabling TLS 1.1 and TLS 1.2).

Kind regards
Stefan

Hi.

I used a an old XP virtual machine that has an old version of chrome ( v47 )

It allows me to login as admin on the 1214C PLC via https.

It has TLS 1.0 and SSL 3.0 enabled.

When i set the same settings for chrome on my Win11 pc i still cannot connect via https to the PLC.

Tried many different combinations of TLS and SSL settings , but nothing works.

Any more ideas ?

Hi lapgoch,

I searched for some information on the internet. It seems that in all modern browsers the support for TLS 1.0 and TLS 1.1 has been removed. Which - for security reasons - is a good fact. Since there is no possibility to enable TLS 1.2 on your PLC, you might have to use an older browser version. You can test the supported TLS version using the SSL/TLS Client Test from BrowserLeaks.

Kind regards
Stefan

Hi Stefan.

Thanks for all your advice.

Seems like trying to get a webpage working on the 1214C is impossible now with new browser security measures.

Looks like i will have to get another PLC.

Weirdly, when I try and login with my iPad using chrome or safari I can access the https login page.

Just have to add code to my webpages for touchscreen control instead of mouse.