I'm setting up a sftp connection.
I have a pub and a ppk key.

I'm getting this error when trying to load the ppk.

15:57:50: ConnectThread (5)
15:57:50: ConnectThread->Setting basic connection settings (5)
15:57:50: ConnectThread->Setting authentication (5)
15:57:50: ConnectThread->Before loading private key: C:\batch\key\id_dsa.ppk (5)
15:57:50: Private key could not be loaded, error: 3337

any ideas?

This simply means that the wrong private key password is used.

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ok, thanks.

Does Visualcron support RSA and DSA encryption for SSH authentication keys?

I get this at the end of the logfile:

22:18:20: ConnectThread->Before Open (5)
22:18:20: Server key (MD5) received, fingerprint is 9b:79:5e:cc:a6:0f:e6:5c:6b:81:4e:55:89:df:cb:23
22:18:20: Server key (SHA1) received, fingerprint is bb:7a:2d:ae:a8:52:2d:ba:50:e1:a3:2e:1b:2c:8c:f5:e3:56:a6:09
22:18:20: Algorithm: RSA, bits: 2048
22:18:20: Authentication type 'public key' failed
22:18:20: SFTP error 114
22:18:20: Server software name: 'OpenSSH_7.6p1 Ubuntu-4ubuntu0.3'
22:18:20: EncryptionAlgorithmClientToServer: 'aes256-ctr'
22:18:20: EncryptionAlgoritmServerToClient: 'aes256-ctr'
22:18:20: MacAlgorithmClientToServer: 'hmac-sha1'
22:18:20: MacAlgorithmServerToClient: 'hmac-sha1'
22:18:20: KexAlgorithm: 'diffie-hellman-group14-sha1'
22:18:20: Connection lost due to error 96273

I'm currently trying DSA.

Yes, we support those type of encryption format but:

SFTP error 96273
Wrong key exchange algorithm is used. See Other Connection error->Set correct Encryption settings

What you should do is to connect using Filezilla with turned on Verbose debugging. Then, after succesful connection you can see exact which encryption, MAC and key exchange algorithm is used. Then set that in VC.

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The DSA is not used/disabled at the SFTP data supplier anymore, so I'll try an RSA key instead.