I've also got this problem, and the workaround in the upstream's github doesn't work because proftpd v1.3.6c doesn't actually know the TLSv1.3 configuration keyword.
Ubuntu 22.04 is also a no go because the package there is also 1.3.6c.
I've also got this problem, and the workaround in the upstream's github doesn't work because proftpd v1.3.6c doesn't actually know the TLSv1.3 configuration keyword.
Ubuntu 22.04 is also a no go because the package there is also 1.3.6c.