Dropbear Secure Shell

Dropbear is a software package written by Matt Johnston that provides a Secure Shell-compatible server and client. It is designed as a replacement for standard OpenSSH for environments with low memory and processor resources, such as embedded systems.

 

 

 

Contents

1. Technology


2. Features


3. Installing Dropbear
   Debian OS
   Centos OS

 

Technology

Dropbear implements version 2 of the Secure Shell (SSH) protocol.

The cryptographic algorithms are implemented using third-party cryptographic libraries included internally in the Dropbear distribution. It derives some parts from OpenSSH to handle BSD-style pseudo terminals.

 

Features

Dropbear implements the complete SSH version 2 protocol in both the client and the server. It does not support SSH version 1 backwards-compatibility to save space and resources, and to avoid the inherent security vulnerabilities in SSH version 1. SCP is also implemented. SFTP support relies on a binary file which can be provided by OpenSSH or similar programs. FISH works in any case and is supported e.g. by Konqueror. Supports elliptic curve cryptography for key exchange and public key authentication as of version 2013.62.

 

Installing Dropbear

Debian OS 32bit dan 64bit

1. Login ke server


2. Update Server dengan mengetikkan perintah
   

   root@host:~# apt-get update

   
   


3. Install Dropbear
   

   root@host:~# apt-get install dropbear

   
   


4. Check, apakah applikasi nano sudah terinstall atau belum.
   Check applikasi nano
   

   root@host:~# whereis nano
   nano: /bin/nano /usr/bin/nano /usr/share/nano /usr/share/man/man1/nano.1.gz

   
   

   Install nano

   
   

   root@host:~# apt-get install nano

   
   


5. Edit Config dropbear
   

   root@host:~# nano /etc/default/dropbear

   
   

   Cari dan rubah

   
   

   NO_START=1
   DROPBEAR_PORT=22
   DROPBEAR_EXTRA_ARGS=

   
   

    
   Menjadi

   
   

   NO_START=0
   # DROPBEAR_PORT=22
   DROPBEAR_EXTRA_ARGS="-p 443 -p 143"

   
   [caption id="attachment_939" align="aligncenter" width="300"] Simpan dengan CRTL+X - Y dan SAVE (ENTER)[/caption]
   

   Simpan dengan  CRTL+X - Y dan SAVE (ENTER)

   
   


6. Restart dropbear dengan mengetik perintah
   

   root@host:~# /etc/init.d/dropbear restart

   
   

    

   
   


7. Check, apakah dropbear sudah berjalan atau belum
   

   root@host:~# netstat -antup | grep '143\|443'
   tcp        0      0 0.0.0.0:143             0.0.0.0:*               LISTEN      367/dropbear
   tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      367/dropbear

   
   


8. Selesai

 

CentOS 5 dan 6

1. Download & Install package untuk dropbear:
   CentOS 5 32-bit
   

   root@host:~# wget ftp://rpmfind.net/linux/epel/5/i386/dropbear-0.55-1.el5.i386.rpm
   root@host:~# rpm -Uvh dropbear-0.55-1.el5.i386.rpm

   
   

    CentOS 5 64-bit

   
   

   root@host:~# wget ftp://rpmfind.net/linux/epel/5/x86_64/dropbear-0.55-1.el5.x86_64.rpm
   root@host:~# rpm -Uvh x86_64/dropbear-0.55-1.el5.x86_64.rpm

   
   

    
   CentOS 6 32-bit

   
   

   root@host:~# wget ftp://rpmfind.net/linux/epel/6/i386/dropbear-2013.62-2.el6.i686.rpm
   root@host:~# wget ftp://rpmfind.net/linux/epel/6/x86_64/libtommath-0.42.0-3.el6.i686.rpm
   root@host:~# wget ftp://rpmfind.net/linux/epel/6/i386/libtomcrypt-1.17-21.el6.i686.rpm

   
   

    INSTALL DEPENDENCIES

   
   

   root@host:~# rpm -Uvh libtommath-0.42.0-3.el6.i686.rpm
   root@host:~# rpm -Uvh libtomcrypt-1.17-21.el6.i686.rpm
   root@host:~# rpm -Uvh dropbear-2013.62-2.el6.i686.rpm

   
   

    CentOS 6 64-bit

   
   

   root@host:~# wget ftp://rpmfind.net/linux/epel/6/x86_64/dropbear-2013.62-2.el6.x86_64.rpm
   root@host:~# wget ftp://rpmfind.net/linux/epel/6/x86_64/libtommath-0.42.0-3.el6.x86_64.rpm
   root@host:~# wget ftp://rpmfind.net/linux/epel/6/x86_64/libtomcrypt-1.17-21.el6.x86_64.rpm

   
   

    INSTALL DEPENDENCIES

   
   

   root@host:~# rpm -Uvh libtommath-0.42.0-3.el6.x86_64.rpm
   root@host:~# rpm -Uvh libtomcrypt-1.17-21.el6.x86_64.rpm
   root@host:~# rpm -Uvh dropbear-2013.62-2.el6.x86_64.rpm

   
   

    

   
   


2. Edit Config dropbear
   

   root@host:~# nano /etc/init.d/dropbear

   
   

    Tambah kan

   
   

   OPTIONS="-p 143 -p 443"

   
   

    Lihat gambar berikut agar lebih jelas

   
   [caption id="attachment_942" align="aligncenter" width="300"] Setelah selesai simpan dengan CRTL+X - Y dan SAVE (ENTER)[/caption]
   
   Setelah selesai simpan config tersebut dengan  CRTL+X - Y dan SAVE (ENTER)


3. Jalankan dropbearnya
   
   

   root@host:~# service dropbear start

   
   


4. Jalankan auto startup dropbear
   
   

   root@host:~# chkconfig --add dropbear
   root@host:~# chkconfig dropbear on

   
   


5. Check, apakah dropbear sudah berjalan atau belum
   

   root@host:~# netstat -antup | grep '143\|443'
   tcp        0      0 0.0.0.0:143             0.0.0.0:*               LISTEN      367/dropbear
   tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      367/dropbear

   
   


6. Selesai

 

See also

• Dropbear Manual Page


• Comparison of SSH servers

 

References

1. "Dropbear ChangeLog". 2014-02-19. Retrieved 2014-03-18.


2. "Ubuntu Manpage: dropbear - lightweight SSH2 server". Ubuntu.com web site. Canonical, Inc. Retrieved 20 June 2011.


3. Official website Dropbear implementation details

 

 

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Author : Unknown

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