Exception in thread main com.jcraft.jsch.JSchException: Auth fail.

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Solve 'com.jcraft.jsch.JSchException: Auth fail.' exception with REHL 9 instance in AWS .

This page tells you how to solve the "com.jcraft.jsch.JSchException: Auth fail." exception when you are trying to connect redhat linux (RHEL) 9 from a java clinet program over SSH using jsch library/jar and authenticated by key or password.

If you trying to connect Red Hat Linux (RHEL) centos 9 over SSH using jsch library and getting following exception, you can solve it by following change..
"com.jcraft.jsch.JSchException: Auth fail."
Exception:

Exception in thread "main" com.jcraft.jsch.JSchException: Auth fail
	at com.jcraft.jsch.Session.connect(Session.java:519)
	at com.jcraft.jsch.Session.connect(Session.java:183)
	at comz.ConnectSSH1.main(ConnectSSH1.java:41)

Solution:
Update crypto-policies of the linux server. set DEFAULT:SHA1 crypto policy executing the command : "update-crypto-policies --set DEFAULT:SHA1" .
Reboot the system also as the plicy update is gloabl and it will impact all the application connecting to this box.
Note: It will lower the sccurity of your linux server. Screenshot:

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