Configure SSH Server - Password Authentication2014/08/02 |
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Configure SSH Server to manage a server from the remore computer. SSH uses 22/TCP.
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| [1] | SSHd is installed even if you installed CentOS with "Minimal Install", so it's not necessarry to install new packages. Furthermore, SSHd is set auto-start setting by default, so it's possible to login without chainging ant settings. But it had better to change for security settings like follows. |
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[root@dlp ~]#
vi /etc/ssh/sshd_config # line 42: uncomment and change ( prohibit root login remotely ) PermitRootLogin no
# line 65: uncomment PermitEmptyPasswords no PasswordAuthentication yes /etc/rc.d/init.d/sshd restart |
| [2] | If IPtables is running, allow SSH port. SSH uses 22/TCP. For "-I INPUT 5" section below, Replace it to your own environment. |
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[root@dlp ~]# iptables -I INPUT 5 -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
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Configure SSH Client : CentOS
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Configure SSH Client of CentOS.
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| [2] | Install SSH Client. |
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[root@client ~]# yum -y install openssh-clients
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| [3] | Connect to the SSH server with a common user. |
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# ssh [username@hostname or IP address] [root@client ~]# ssh cent@dlp.srv.world The authenticity of host 'dlp.srv.world (<no hostip for proxy command>)' can't be established. ECDSA key fingerprint is xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:60:90:d8. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'dlp.srv.world' (ECDSA) to the list of known hosts. cent@dlp.srv.world's password: # password of the user [cent@dlp ~]$ # just logined |
| [4] | It's possbile to execute commands on remote Host with adding commands to ssh command. |
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# for example, open /etc/passwd on remote host [cent@client ~]$ ssh cent@dlp.srv.world "cat /etc/passwd" cent@dlp.srv.world's password: root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin ... ... postfix:x:89:89::/var/spool/postfix:/sbin/nologin sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin |
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Configure SSH Client : Windows
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Configure SSH Client of Windows.
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Get a SSH Client for Windows. This example shows to use Putty like follows.
Input your server's IP address and Click 'Open' button.
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| [6] | After authentication on SSH server, it's possible to login remotely with SSH. |
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