On Mon, Nov 15, 2021 at 08:48:20PM +0000, John Edwards wrote:
Hi

Verification reports OK on my machine (Ubuntu 20.04).

The "ISRG Root X1" CA certificate should be in Debian 8 and above:
        https://letsencrypt.org/docs/certificate-compatibility/
        https://letsencrypt.org/certificates/


On Ubuntu (and probably also Debian) this CA certificate is
/etc/ssl/certs/ISRG_Root_X1.pem which is a symlink to
/usr/share/ca-certificates/mozilla/ISRG_Root_X1.crt

So you may want to check that those files still exist and have not
been altered (assuming location is same/similar on Debian).

For info the SHA1 sums on my machine are:

$ sha1sum /etc/ssl/certs/ISRG_Root_X1.pem 
/usr/share/ca-certificates/mozilla/ISRG_Root_X1.crt
4de9627fe9ace4acce27eaa1a0837cd3db55704b  /etc/ssl/certs/ISRG_Root_X1.pem
4de9627fe9ace4acce27eaa1a0837cd3db55704b  
/usr/share/ca-certificates/mozilla/ISRG_Root_X1.crt

Which match the PEM file on Let's Encrypt site:
     https://letsencrypt.org/certs/isrgrootx1.pem.txt


Thanks, matches exactly what I have. I assume I just need irssi to read it.

Regards,
Henrik Morsing

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