Putty Connecting the CentOS server

Putty Connection Centos Server

ps:client Connection Server A lot of methods, usually C/S mode.

Common ways to connect servers are:

1. user name and password login, security level is very low.

2. Modify the port ( Set the default port to a different port) to log on with a low security level.

3. set the complex password login, security level bottom.

4. Log in to the server with the secret key, the highest security level.

one, the following to introduce the use of Putty Login Centos server, the following are the specific operations:

Download Putty tool or CRT , personal habits use Putty , and then open Puttygen This tool

with Puttygen this tool to generate key pairs ( The key will be generated when the mouse is prompted to swipe to generate)

Put the generated public and private keys in a directory to save (if the private key is lost, there will be a server can not log on, remember!!) ）

Second, the server-side operation is as follows:

1.yum-y Install Openssh-server openssh-clients

2. server-side generate secret key pair ssh-keygen-t RSA

3. after generating the secret key, there will be an . SSH directory, which has the public key (. Pub) and private key of the server, which makes it easy to jump to other servers.

4. Create the authorized_keys file in the . SSH directory and pour the client's public key into the The Authorized_keys file. The following is The public key of the client side.

5. authorizing /root/.ssh/ directory Permissions

chmod 700/root/.ssh/

6. Server modification /etc/ssh/sshd_config configuration file (backup first, then modify!!!) ), open key authentication!!                      

7. Restart the SSH Services service sshd restart or /etc/init.d/sshd restart< /c8>

Verify:

Client Login

Set Secret key

OK Operation completed ~~

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Putty Connecting the CentOS server