v3.7.5 - Could not negotiate key exchange algorithm (wodSFTP / wodSFTP.NET / wodSFTPdll)

Hi,

I have just brought the new version 3.7.5. I was using an old before, but I get the same error.

Could not negotiate key exchange algorithm

If I use putty it works, see below.

The server has changed the to use 'Curve25519'. This should be working, but when I check the 'KeyExchangeList' from the program I old get this:
diffie-hellman-group-exchange-sha256,
diffie-hellman-group-exchange-sha1,
diffie-hellman-group1-sha1,
diffie-hellman-group14-sha1,kex-strict-c-v00@openssh.com

Please help ASAP, as we have a production system not working for a lot of users.

/Torben
---
Looking up host "ei-indberetning.skat.dk" for SSH connection
Connecting to 85.89.235.173 port 11022
We claim version: SSH-2.0-PuTTY_Release_0.83
Connected to 85.89.235.173 (from 10.20.30.94:49202)
Remote version: SSH-2.0-Maverick_SSHD
Using SSH protocol version 2
No GSSAPI security context available
Enabling strict key exchange semantics
Doing ECDH key exchange with curve Curve25519, using hash SHA-256 (unaccelerated)
Host key fingerprint is:
ssh-rsa 4096 SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Initialised AES-256 SDCTR (AES-NI accelerated) outbound encryption
Initialised HMAC-SHA-256 (unaccelerated) outbound MAC algorithm (in ETM mode)
Initialised AES-256 SDCTR (AES-NI accelerated) inbound encryption
Initialised HMAC-SHA-256 (unaccelerated) inbound MAC algorithm (in ETM mode)
--

Hi

Any chance we can connect there to see what is available? We don't need login and pass, just the IP and permission to connect.

Regards,

Jasmine

IP: 85.89.235.173
Port: 11022

Server supports only these two key exchanges:

curve25519-sha256@libssh.org
ecdh-sha2-nistp521

wodSFTP.NET doesn't support those, but let me check if we can add any of them for you.

Jasmine