Getting the below error when trying to ping of the SFTP folders in the dataiku instance:

Asiya

Getting the below error when trying to ping of the SFTP folders in the dataiku instance:

SSH error connecting to ftp1.str.com, caused by: JSchAlgoNegoFailException: Algorithm negotiation fail: algorithmName="server_host_key" jschProposal="ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-512,rsa-sha2-256" serverProposal="ssh-rsa"

 

Alexandru

Hi,
The error is caused by routine upgradse to the jsch library in recent DSS releases. The supported algorithms has changed and is incompatible with that SFTP server. Ideally you can check with admins of "ftp1.str.com" and make sure at least one of the proposed algorithms is supported "sh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-512,rsa-sha2-256"

If this is not an option, you can downgrade the security / supported aglorithms:


1) Stop DSS

./bin/dss stop

2) Edit the install.ini locate in the DATADIR

If it does not exist, add a [javaopts] section

add lines :
​
​jek.additional.opts= -Djsch.server_host_key=ssh-rsa,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-512,rsa-sha2-256
fek.additional.opts= -Djsch.server_host_key=ssh-rsa,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-512,rsa-sha2-256
backend.additional.opts= -Djsch.server_host_key=ssh-rsa,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-512,rsa-sha2-256

Regenerate the runtime config:

./bin/dssadmin regenerate-config

Start DSS

./bin/dss start

Thanks