CAP * LS :draft/sts=duration=5184000,port=6697 There is a draft capability underway that enables the equivalent of HSTS for IRC connections. We should ship that once we think it's stable, using some modern variation of this old gist: https://gist.github.com/attilamolnar/4bd0ed6418ade8fb386c
http://ircv3.net/specs/core/sts-3.3.html Note that the spec is authored by our IRC server and IRC client contacts, which may simplify this somewhat.
m_ircv3_sts is now in the official inspircd-extras repo and should be installable via the module manager. https://github.com/inspircd/inspircd-extras/blob/master/2.0/m_ircv3_sts.cpp
We're not spending a lot of time on the IRC network right now, maybe someday.