Oracle RAC SSH Passwordless Setup issue - com.jcraft.jsch.JSchException: Algorithm negotiation fail

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 Oracle RAC SSH Passwordless Setup issue  - com.jcraft.jsch.JSchException: Algorithm negotiation fail 


issue: SEVERE: com.jcraft.jsch.JSchException: Algorithm negotiation fail 


Solution:


Explicitly add the full set of algorithms in the sshd_config and restart sshd


(as root privileged user)


1. Edit the /etc/ssh/sshd_config to contain the following line:


KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1


2. Restart the sshd service for changes to take effect.


# /etc/init.d/sshd restart


Screenshot

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appsdbahelp

17+ years of experience in Oracle Database, Oracle Cloud Infrastructure(OCI), Oracle EBS on Cloud, Oracle E-Business Suite, DevOps tools, Oracle WebLogic, Oracle Application Server, Oracle Access Manager and various Operating System flavors including Redhat Linux, UNIX (Solaris, HP-UX) and Windows. Expert in Oracle9i/10g/11g/12c/19c database administration, upgrade, configuration and tuning. Experience in Oracle E-Business Suite technological stack, including architecture, installation, configuration, maintenance, tuning, cloning and patching procedures. Expert in Oracle Cloud Infrastructure(OCI), Oracle EBS On Cloud and Oracle EBS Cloud Manager Experience with Oracle Cloud Solution and Expert of Oracle ERP/Oracle HCM Cloud deployment Experience in Terraform, JSON and chef cloud infrastructure automation framework Knowledge of ASM, Data Guard, Real Application Cluster, Exadata and Exalogic Knowledge of Oracle Enterprise Manager(OEM) Grid Control, Oracle WebLogic, Oracle Internet Directory, Oracle Access Manager and Apache Ability to analyze problem, develops solutions and bring program/project execution to completion.

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