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Shellinabox

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Shellinabox

Shell In A Box (pronounced as shellinabox) is a web based terminal emulator created byMarkus Gutschke. It has built-in web server that runs as a web-based SSH client on a specified port and prompt you a web terminal emulator to access and control your Linux Server SSH Shell remotely using any AJAX/JavaScript and CSS enabled browsers without the need of any additional browser plugins such as FireSSH.

In this tutorial, I describe how to install Shellinabox and access remote SSH terminal using a modern web browser on any machine. Web-based SSH is very useful when you are protected with firewall and only HTTP(s) traffic can get through.

Installing Shellinabox on Linux

By default, Shellinabox tool is included on many Linux distributions through default repositories, including DebianUbuntu and Linux Mint.

Make sure that your repository enabled and available to install Shellinabox from the that repository. To check, do a search for Shellinabox with the “apt-cache” command and then install it using “apt-get” command. `

On Debian, Ubuntu and Linux Mint
$ sudo apt-cache search shellinabox
$ sudo apt-get install openssl shellinabox
On RHEL, CentOS and Fedora
On Red Hat based distributions, you need to first have enable EPEL repository and then install it using the following “yum” command. (Fedora users don’t need to enable EPEL, it’s already a part of Fedora project).
# yum install openssl shellinabox

Configuring Shellinabox

By default, shellinaboxd listens on TCP port 4200 on localhost. For security reason, I change this default port to a random (i.e. 6175) to make it difficult for anyone to reach your SSH box. Also, during installation a new self-signed SSL certificate automatically created under “/var/lib/shellinabox” to use HTTPS protocol.

On Debian, Ubuntu and Linux Mint
$ sudo vi /etc/default/shellinabox
# TCP port that shellinboxd's webserver listens on
SHELLINABOX_PORT=6175

# specify the IP address of a destination SSH server
SHELLINABOX_ARGS="--o-beep -s /:SSH:172.16.25.125"

# if you want to restrict access to shellinaboxd from localhost only
SHELLINABOX_ARGS="--o-beep -s /:SSH:172.16.25.125 --localhost-only"
On RHEL, CentOS and Fedora
# vi /etc/sysconfig/shellinaboxd
# TCP port that shellinboxd's webserver listens on
PORT=6175

# specify the IP address of a destination SSH server
OPTS="-s /:SSH:172.16.25.125"

# if you want to restrict access to shellinaboxd from localhost only
OPTS="-s /:SSH:172.16.25.125 --localhost-only"

Starting Shellinabox

Once you’ve done with the configuration, you can start the service by issuing following command.

On Debian, Ubuntu and Linux Mint
$ sudo service shellinaboxd start
On RHEL and CentOS
# service shellinaboxd start
On Fedora
# systemctl enable shellinaboxd.service
# systemctl start shellinaboxd.service

Verify Shellinabox

Now let’s verify whether Shellinabox is running on port 6175 using “netstat” command.

$ sudo netstat -nap | grep shellinabox
or
# netstat -nap | grep shellinabox
tcp        0      0 0.0.0.0:6175            0.0.0.0:*               LISTEN      12274/shellinaboxd

Now open up your web browser, and navigate to https://Your-IP-Adress:6175. You should be able to see a web-based SSH terminal. Login using your username and password and you should be presented with your shell prompt.

Install Shellinabox in Linux

Shellinabox SSH Login

Shellinabox SSH Shell

Shellinabox SSH Shell

Shellinabox SSH Logout

Shellinabox SSH Logout

You can right-click to use several features and actions, including changing the look and feel of your shell.

Shellinabox More Options

Shellinabox More Options

Make sure you secure you shellinabox on firewall and open 6175 port for specific IP Addressto access your Linux shell remotely.

Comments   

 
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