Server refused our key - AWS

I am getting following error since last few days.

 Using username "centos". Server refused our key 's password:

It appeared after I changed permission of /home/centos since I wanted to view some files inside home/centos/.local folder.

Current permissions are :

/home/centos -> 755

/home/centos -> 777

/home/centos/.ssh -> 777

I visited this link, it says that -

The procedure doesn't correct the issue if permissions to the home directory are broken. You must manually correct the home directory permissions

So I want to know How can I fix these permissions manually?

I am not able to change permissions using FileZilla and I am not able to login over instance using Putty.

Please suggest.

2 Answers

Your problem was related to .ssh

If this directory containing your personal key, is read AND writeable to anyone else then the user, the system sees this as a security breach and ssh stops working.

Always make sure that,the folder has chmod 700

Always make sure that your personal *.key is only readable by the user.

Here this is what it should look like

The folder has a chmod 700, the private key id_rsa a 600, public key and known_hosts has a 644

drwx------ 5 s1mmel staff 160B Dec 11 15:24 .
drwx------+ 46 s1mmel staff 1.4K Jan 22 11:53 ..
-rw------- 1 s1mmel staff 3.3K Dec 11 15:15 id_rsa
-rw-r--r-- 1 s1mmel staff 745B Dec 11 15:15 id_rsa.pub
-rw-r--r-- 1 s1mmel staff 889B Jan 16 18:20 known_hosts

I am new linux learner and I learned a lot after this issue came.

Since permissions of /centos and /.ssh directory was broken so I had to fix those. Permission of /centos & /.ssh directory should be 700.

I followed below link to change the permission manually.

Access secondary EBS volume and change permission of /.ssh directory - AWS

Detached the Volume and attached it back to the original instance. Installed firewalld, enabled port 80 & 443, started Apache.

Now website is working fine.