Can't ssh to cygwin in a domain from Linux and Mac - linux

Question

Following this page I successfully configured Cygwin sshd in a Windows 10 computer running as a member of a Windows(Samba) domain.
I can ssh to that machine from a Windows 10 inside the domain and from a Windows 10 outside the domain. I am running the ssh command in Cygwin in both cases.
But, I can't connect from a Linux Debian 10 machine outside the domain, I can't connect from the Linux Debian 10 running the Samba DC, I can't connect from a Mac outside the domain.
Any ideas?
I use always the same command to start the connection ssh nicola#domus, the same in each OS. I attach the last part of what I see in the attempt to connect via Linux.
$> ssh -vvv nicola#domus
...
debug3: hostkeys_foreach: reading file "/home/p/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/p/.ssh/known_hosts:76
debug3: load_hostkeys: loaded 1 keys from 172.16.3.53
debug1: Host 'domus' is known and matches the ECDSA host key.
debug1: Found key in /home/p/.ssh/known_hosts:75
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug1: Will attempt key: /home/p/.ssh/id_rsa RSA SHA256:hcDASnV1vvd88xpKM/xN2XtUSCvcW3oPUz0izqFMTBE
debug1: Will attempt key: /home/p/.ssh/id_dsa
debug1: Will attempt key: /home/p/.ssh/id_ecdsa
debug1: Will attempt key: /home/p/.ssh/id_ed25519
debug1: Will attempt key: /home/p/.ssh/id_xmss
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,sk-ssh-ed25519#openssh.com,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256#openssh.com,webauthn-sk-ecdsa-sha2-nistp256#openssh.com>
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /home/p/.ssh/id_rsa RSA SHA256:hcDASnV1vvd88xpKM/xN2XtUSCvcW3oPUz0izqFMTBE
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
Connection closed by 172.16.3.53 port 22

Answer 1

I found just after posting that I can actually connect via Linux and Mac if I force password authentication.
ssh -o PreferredAuthentications=password -o PubkeyAuthentication=no nicola#domus
But, I consider this more a quick fix than a solution. Do you have any better ideas?