Wing FTP Software

I have a client using FTP Rush to connect to my SFTP server. We recently updated the server's cryptography configuration and found that FTP Rush was unable to connect.

Issue Details:
We updated our SFTP server to allow only the following secure signature algorithms:

rsa-sha2-256
rsa-sha2-512
ecdsa-sha2-nistp256
ecdsa-sha2-nistp384
ecdsa-sha2-nistp512

After making this change, a client using FTP Rush encountered a protocol error and was unable to connect. We performed additional testing and found that re-enabling the deprecated ssh-rsa (SHA-1) signature algorithm allowed the connection to succeed.

Question:
Is this expected behavior? Does FTP Rush support rsa-sha2-256 or ecdsa signatures, or is ssh-rsa required for compatibility?

Yes, because old FTP Rush 2.x doesn't support those key exchange algorithms, maybe you can use FTP Rush 3.x instead: https://www.wftpserver.com/ftprush.htm

Hello,
Thank you for the reply. The client and our testing used the latest version, 3.5.8.

Hello, thank you for your response. Our client and tests utilized the latest software release, version 3.5.8, during our analysis.