How I got my N900 back on HTTPS after Sep 30.
 

On September 30 2021, DST Root CA X3 expired which affected a lot of websites including my email provider and TMO.

But I decided not to give up so I started looking into it. Apparently ISRG Root X1 is added in a CSSU update (i'm on testing) but for some reason it ignored the existent of the CA.

After some further digging, I found this note on updating certs so I tried it: parse certdata.txt, transfer certs folder to MyDocs and run cmcli as said, still doesn't work :(

So out of the blue I decided to just google "isrg root x1" and check out Let's Encrypt Chain of Trust.
On that page I found root certificates along side with it's PEM files, there's another version with it cross-signed with DST X3 and that's something I never tried before as most of the certs on the device are self signed.

I downloaded it and installed it on the device, lo and behold, TMO now loads on my N900 without an error and my email now works again! :D

For good measure, I installed the ISRG X2 cert as well. Now my N900 on Fremantle is useful again. :p

tl;dr version

1. Go to this page https://letsencrypt.org/certificates/
2. Download "Cross-signed" version of ISRG Root X1 in PEM format
3. Transfer the file to the N900
4. Open Settings and navigate to "Certificate Manager"
5. Import the certificate, accept the default and enjoy!

Re: How I got my N900 back on HTTPS after Sep 30.
 

This cert was shared on symbian telegram group and I further shared it on meego group.

Re: How I got my N900 back on HTTPS after Sep 30.
 

This thread needs to be pinned, @Danct12, or anyone else.. Can you put the steps on how to do this? (For the noobs like myself?)

Re: How I got my N900 back on HTTPS after Sep 30.
 

For me too please

Re: How I got my N900 back on HTTPS after Sep 30.
 

I added a tl;dr version of this post, let me know if it works for you!

Re: How I got my N900 back on HTTPS after Sep 30.
 

Great it works like a charm.
any advice for the Nokia n9?

Re: How I got my N900 back on HTTPS after Sep 30.
 

On Nokia n800 the certificate is imported, but TMO is loaded without this certificate

Re: How I got my N900 back on HTTPS after Sep 30.
 

You can transfer ISRG Root X1 to MyDocs on N9 and install via Filebox as here:https://talk.maemo.org/showpost.php?...51&postcount=4

Re: How I got my N900 back on HTTPS after Sep 30.
 

i tried there is no chance to install it. have no Button only back button?

i managed via :

http:// https://talk.maemo.org/showpost.php?...24&postcount=6

thanks to @Danct12

But is there something wrong with my N9 ? :o

Re: How I got my N900 back on HTTPS after Sep 30.
 

Just press back button and try websites that are unreachable earlier %)