~/.ssh/id_curioustechnoid is the private SSH Key used to connect to server.161.35.77.93 This is the Remote Server IP Address.This is nothing but localhost in the remote server 127.0.0.1 is the Remote Server localhost.2000 is the local port that we will use in the client.Cygwin is a linux like environment for Windows that contains an SSH package.First we will create the SSH Tunnel by running the below command in terminal: ssh -N -L 2000:127.0.0.1:3306 -i ~/.ssh/id_curioustechnoid Under Windows, you'll need a client like SecureCRT, which is commercial software.
USE SSH TUNNEL FREE
OpenSSH is a free open source version of SSH connectivity tools. To set this up, all you'll need an SSH client capable of tunneling. Anyone trying to listen in on the conversation between your home computer and work machine, will hear something resembling noise. You then direct your email client to your local POP port and it thinks that it is talking to the remote end, only this time, the entire session is encrypted.
USE SSH TUNNEL SOFTWARE
The SSH client software sets up a port forwarding mechanism, making the traffic heading to your home computer's POP be forwarded over the encrypted tunnel and end up at the mail server's POP port. To avoid this, instead of connecting directly, establish an SSH connection to the network of which the mail server is a part of.
USE SSH TUNNEL PASSWORD
By connecting to the machine directly, you would be sending your login and password in the open and risk having them stolen to be subsequently used to gain access to confidential information. The server takes any bits received from the mailserver and sends them inside the SSH session back to the client, who decrypts and sends them in the clear to the process that connected to the client's bound port (the port you intially specified).ħ) When the connection is closed by either endpoint, it is torn down inside the SSH session as well.Ī typical use would be to securely retrieve e-mail from work, while at home & using a POP client. In this example, we will create secure connection using SSH and local port fowarding.ġ) First you launch the SSH client on the command line.Ģ) Use the SSH client to log into the remote machine using whatever authentication method is available, such as password, Pubkey, etc.ģ) The SSH client binds the local port you specified, on the loopback interface, 127.0.0.1.Ĥ) When a process connects to 127.0.0.1 on the the client machine on the port you specified, SSH client program accepts the conection.ĥ) The SSH client informs the server, over the encrypted channel, to create a connection to the destination, such as a mailserver shown in the example below.Ħ) The client takes any bits sent to the port you specified on your machine and sends them to the server inside the encrypted SSH session, who decrypts them and then sends them in the clear to the destination (the mailserver). This protocol must be understood by both tunnel interfaces and commonly come in the form of GRE, IPSec, L2F, PPTP & L2TP.\\Ĭarrier Protocol - This is the protocol use by the network that the encapsulated package is travelling over.
Passenger Protocol - This is the original data being transferred that may be either insecure or incompatible with the carrier protocol.Įncapsulating Protocol - This is the protocol that is wrapped around the original passenger protocol. Tunnel Interfaces - These are the points where the starting and destination networks come into contact with the tunnel.
USE SSH TUNNEL SERIES
The Tunnel - The series of networks that the packet must travel to go from the starting network to the destination network.
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