Hi there.
I'm using iOS 14.6 as a client, though I got similar results with earlier iOS versions.
The app versions are: Acrosync: 3.1
PhotoBackup: 1.8
Those are the latest, as far as I know.
Thank you.
On my server running OpenBSD 6.9 with OpenSSH 8.6, the diffie-hellman-group-exchange-sha256 exchange is enabled as you say.
Any attempts to connect from PhotoBackup or Acrosync produce this message in the sshd log:
sshd[PID]: Unable to negotiate wit…