Preinstallation tasks
Before we start let's see how to prepare our machine for the installation. What follows is mostly a collection of hints that I extracted from the comments, so feel free to contribute. On Debian 11, you may have to install at least...
ucspi-tcp6
More info: http://www.fehcom.de/ipnet/ucspi-tcp6.html Author: Erwin Hoffmann. IPv6 capabilities have been included by Felix von Leitner's IPv6 patch. The original ucspi-tcp 0.88 is by D.J. Bernstein Version: 1.12.4 ucspi-tcp6 is a fork of Bernsteins' ucspi-tcp 0.88 program, which includes, among the other things, ipv6 capabilities...
Denying bad DNS HELO/EHLOs
Changelog Aug 17, 2023- C++ version Aug 13, 2023- v. 8.2.0 bug fix: segfault in case of no result in DNS record- default action changed to GNLR Jul 27, 2023- P will now pass through making all filters ignored. You are invited to remove this option...
Installing a Let's Encrypt certificate for your qmail, dovecot and apache servers
Changelog Aug 6, 2023The certificates installation is now based on dehydrated. The previous documentation based on certbot will be left as is at the bottom of this page, but it won't be updated anymore. May 18, 2023added the option --key-type rsa to the...
