On 15/11/2021 14:38, Henrik Morsing via GLLUG wrote:

Hi all,

My ISP started enforcing SSL on their IRC channel, and I have not been able to connect since. I get:

14:33 -!- Irssi: warning Could not verify TLS servers certificate: unable to get local
           issuer certificate

I had a similar problem recently in that my installation of Roundcube wouldn't talk to my own IMAP server. What was needed was to enable trust of the relevant root certificate.

You do it with "dpkg-reconfigure ca-certificates" and make sure the one being used by your ISP is trusted.

HTH,
John--
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