OpenSSH : Password Authentication2014/07/09 |
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Configure SSH Server to login to a server from remote computer.
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| [1] | OpenSSH is already installed by default even if you installed CentOS with [Minimal Install], so it's not necessarry to install new packages. You can login with Password Authentication by default, but change some settings for security like follows. |
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[root@dlp ~]#
vi /etc/ssh/sshd_config # line 38: uncomment and change (prohibit root login remotely) PermitRootLogin no
systemctl restart sshd |
| [2] | If Firewalld is running, allow SSH service. SSH uses 22/TCP port. |
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[root@dlp ~]# firewall-cmd --add-service=ssh --permanent success [root@dlp ~]# firewall-cmd --reload success |
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Configure SSH Client : CentOS
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Configure SSH Client on CentOS.
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| [3] | Install SSH Client. |
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[root@client ~]# yum -y install openssh-clients
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| [4] | Connect to 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
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| [5] | It's possible to execute commands on remote Host with SSH like follows. |
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# for example, execute [cat /etc/passwd] [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 #1
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Configure SSH Client on Windows.
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| [6] | Get a software which you can login with SSH from Windows clients. This example shows to use Putty. Install and start it and input your server's IP address and Click [Open] button like follows. |
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| [7] | After succeccing authentication, it's possible to login like follows. |
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SSH Client : Windows #2
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| [8] | If your Windows is Windows 10 Version 1803, OpenSSH Client has been implemented as a Windows feature, so it's possible to use ssh command on command prompt without Putty and other SSH software. |
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| [9] | It's the same usage because it's the OpenSSH Client, refer to [3], [4] section. |
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