Git authenticate error

Question

Created SSH-key with command:

ssh-keygen.exe -C "my@email.com" -t dsa

Entered passphrase, etc. Files were created: id_dsa, id_ds.pub in C:/Users/MyName/.ssh. File was added to git-auth: ssh-add ~/.ssh/id_rsa. Now trying to connect to git repo: $ ssh -vT -p NNNN ssh://git@some-repo.com

Returns error:

$ ssh -vT -p 52967 ssh://git@some-repo.com.com
OpenSSH_7.1p2, OpenSSL 1.0.2d 9 Jul 2015
debug1: Reading configuration data /c/Users/MyName/.ssh/config
debug1: /c/Users/MyName/.ssh/config line 1: Applying options for *
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to some-repo.com.com [216.70.245.85] port 52967.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/MyName/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/MyName/.ssh/id_rsa-cert type -1
debug1: identity file /c/Users/MyName/.ssh/id_dsa type 2
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/MyName/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/MyName/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/MyName/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/MyName/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/MyName/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1.8
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1.8 pat OpenSSH_5* compat 0x0c000000
debug1: Authenticating to some-repo.com.com:52967 as 'ssh://git'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr umac-64@openssh.com none
debug1: kex: client->server aes128-ctr umac-64@openssh.com none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ssh-rsa SHA256:Zw5XXi0GgafMm6AhcKnNw+GzqkotZwXZYPWrZogG9KQ
debug1: Host '[some-repo.com.com]:52967' is known and matches the RSA host key.
debug1: Found key in /c/Users/MyName/.ssh/known_hosts:1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Skipping ssh-dss key /c/Users/MyName/.ssh/id_dsa for not in PubkeyAcceptedKeyTypes
debug1: Trying private key: /c/Users/MyName/.ssh/id_rsa
debug1: Trying private key: /c/Users/MyName/.ssh/id_ecdsa
debug1: Trying private key: /c/Users/MyName/.ssh/id_ed25519
debug1: Next authentication method: password
ssh://git@some-repo.com.com's password:
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
ssh://git@some-repo.com.com's password:
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
ssh://git@some-repo.com.com's password:
debug1: Authentications that can continue: publickey,password
debug1: No more authentication methods to try.
Permission denied (publickey,password).

So it can't find the file /c/Users/MyName/.ssh/id_dsa but file exists, I see it in explorer or by ls command. What is the problem could be? What does this mean:

debug1: Skipping ssh-dss key /c/Users/MyName/.ssh/id_dsa for not in PubkeyAcceptedKeyTypes

?

Actually with this command I'm trying to figure out authentication problem with Git 2.7.1 and TortoiseGit when I try to clone a repository. Cloning works fine with GitExtensions 2.48.05 with old MsysGit 1.9.5 (SSH 6.1), but fails with newest Git.

Answer 1

Try to add your private key to the ssh command you're doing: ssh -vT -p 52967 -i <path_to_your_private_key> ssh://git@some-repo.com.com

Answer 2

$ ssh -vT -p 52967 ssh://git@some-repo.com.com
...
debug1: Authenticating to some-repo.com.com:52967 as 'ssh://git'

To start with, the OpenSSH ssh utility doesn't accept URLs on its command line. When it parses the string "ssh://git@some-repo.com.com" into a username and hostname, it's taking the entire string "ssh://git" as a username. You should remove the "ssh://" from the command which you are running:

ssh -vT -p 52967 git@some-repo.com.com

As for this error:

debug1: Skipping ssh-dss key /c/Users/MyName/.ssh/id_dsa for not in PubkeyAcceptedKeyTypes

You are using SSH 7.1, which disables support for DSA type keys by default. You could use an RSA key instead, or see this page to reenable DSA key support in your client. In short, you'd add something like this to your local ssh config file:

Host some-repo.com.com
    KexAlgorithms +diffie-hellman-group1-sha1