SSH Error- Permission denied (publickey,gssapi-keyex,gssapi-with-mic)

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 Problem-  The authenticity of host 'IP X.X.X.X' can't be established.

ECDSA key fingerprint is SHA256:U8lQ0PvPeWJgvTWC+MHS2Idjt4ZxcDzoW5/7kwJ60X0.

ECDSA key fingerprint is MD5:2f:73:20:11:42:5e:02:8a:65:5a:f3:e1:2c:f8:ad:57.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'host IP' (ECDSA) to the list of known hosts.

Permission denied (publickey,gssapi-keyex,gssapi-with-mic).


Solution- Sometimes it happens we face above issue while making SSH connection between 2 servers or hosts.

Step 1- Make sure ssh server is running 

Step 2- Make some configuration changes in SSHD_Config file accordingly.

Goto- vi /etc/ssh/sshd_config here we need to make 3 changes

1.Uncommet line- PasswordAuthentication yes

2. Commet Line - #PasswordAuthentication no (This will be line number three)

3. Uncommet- PermitRootLogin yes

Step 3- Restart service to apply these changes

service sshd restart



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