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I upgraded to Ubuntu 20.04.1 and chose to keep my existing config files, and my mail server stopped working. In the log I saw:
Nov 25 09:07:57 machine dovecot: imap-login: Error: Failed to initialize SSL server context: Can't load DH parameters: error:1408518A:SSL routines:ssl3_ctx_ctrl:dh key too small: user=<>, rip=someip, lip=someip, session=<someid>
I was able to fix this by modifying /etc/dovecot/conf.d/10-ssl.conf and adding this line:
ssl_dh = </usr/share/dovecot/dh.pem
Please let me know if I've introduced an horrific security bug, won't you?
Originally posted at 2020-11-25 09:15:30+00:00. Automatically generated from the original post : apologies for the errors introduced.
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