Secure Email Services

Kita mungkin menginginkan akses SSH secara langsung ke remote server tanpa login. Kita dapat menggunakan SSH Key untuk melakukan otentikasi.

Prinsip penggunaan SSH untuk otentikasi adalah

  1. Pada lokal membuat private_key dan public_key
  2. Kunci public_key dicopy ke remote
  3. Lokal dapat melakukan akses ke remote tanpa username dan password

Berikut contoh penggunaan

  1. Membuat private_key dan remote_key pada lokal:
    [ultima@server-1041211-1 ~]$ ls .ssh
    known_hosts
    [ultima@server-1041211-1 ~]$ ssh-keygen -t rsa
    Generating public/private rsa key pair.
    Enter file in which to save the key (/home/ultima/.ssh/id_rsa):
    Enter passphrase (empty for no passphrase):
    Enter same passphrase again:
    Your identification has been saved in /home/ultima/.ssh/id_rsa.
    Your public key has been saved in /home/ultima/.ssh/id_rsa.pub.
    The key fingerprint is:
    
  2. Mencopy public_key ke remote server menggunakan perintah ssh-copy-id:
    [ultima@server-1041211-1 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pub backup@b1.adadeh.com
    The authenticity of host 'b1.adadeh.com (103.52.)' can't be established.
    ECDSA key fingerprint is d8:47:32:98:c8:f.
    Are you sure you want to continue connecting (yes/no)? yes
    /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
    /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
    backup@b1.adadeh.com's password:
    
    Number of key(s) added: 1
    
    Now try logging into the machine, with:   "ssh 'backup@b1.adadeh.com'"
    and check to make sure that only the key(s) you wanted were added.
    
    

     

  3. Langsung akses ssh:
    [ultima@server-1041211-1 ~]$ ssh backup@b1.adadeh.com
    Last login: Thu Oct 15 15:45:46 2020
    [backup@b1 ~]$
    

     

Pada remote akan muncul authorized_keys seperti berikut ini

[backup@b1 ~]$ ls -al .ssh
total 16
drwx------. 2 backup backup 80 Oct 15 16:03 .
drwx------. 3 backup backup 95 Oct 15 15:43 ..
-rw-------. 1 backup backup 423 Oct 15 16:03 authorized_keys

Untuk menggunakan rsync kita dapat menjalankan perintah seperti berikut ini

rsync -ar ./client backup@b1.adadeh.com:ultima2

Untuk menggunakan rsync pada port selain 22 kita dapat menggunakan perintah seperti berikut ini

rsync -ar /backup backup@b1.adadeh.com:sg4 --rsh='ssh -p 1530'

Informasi lebih lanjut silahkan mengunjung
1.  https://upcloud.com/community/tutorials/use-ssh-keys-authentication/ .
2. https://www.digitalocean.com/community/tutorials/how-to-use-rsync-to-sync-local-and-remote-directories-on-a-vps .
3. https://www.linuxquestions.org/questions/linux-software-2/rsync-ssh-on-different-port-448112/ .
4. https://www.tecmint.com/rsync-local-remote-file-synchronization-commands/ .
5. https://www.proweb.co.id/articles/centos7/screen_ssh.html .

Kunjungi www.proweb.co.id untuk menambah wawasan anda.

SSH Key Authentication untuk Rscync
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