In this case, you can use SSH tunneling to create a secure connection to the remote network, and then access the services you need as if you were on the network directly. For example, you might use this technique if you need to securely access services on a remote network, but the network does not have a VPN. There are many situations in which SSH tunneling can be useful. In a future article we will explain how to edit /etc/hosts in Windows and Linux for this purpose. This allows you to put or into your browser’s address bar, and the browser would then believe these websites are hosted at IP address 127.0.0.1, and so the traffic would go via your tunnel. You’d then update your /etc/hosts file to point to 127.0.0.1. To get this started, you want to have the “Source Port” be port 80 (for http websites), or port 443 (for https websites), in the PuTTy settings. However, there is a way around this limitation, but it requires a bit of effort, and needs to be done for each website you want to access. Due to these limitations, this type of tunnel setup is usually better for traffic other than website traffic, such as telling an email client what server IP and port to connect to. However, the website at that address would usually link to the full domain name at and so clicking on anything would lead to loading the website directly instead of through the tunnel. If you are using a web browser to get to you can now browse to it via the tunnel when entering the URL. Any traffic sent to the local IP and port will be forwarded through the secure SSH tunnel to the destination host and port. 8080) as if it were the remote port on the destination host (e.g. Once the tunnel is established, you can use your local port (e.g. Almost there! Just click “open” to connect via SSH, and enter your username and password when prompted. ![]() From here, enter a name for the session under “Saved Sessions”, and then click “Save” so that you can easily load these options again later. Click the “Session” option in the “Category” panel to go back to the first screen again.Under “Forwarded ports” select “Local”, and then click “Add”.For example, you might enter “if you’d like your tunnel to send its traffic to the http port on the host Next fill in the “Destination” field, enter the destination hostname or IP, followed by the destination port number.Under “Source port” put down the local port number you want to connect to for forwarded traffic.Click through “Connection” > “SSH” > “Tunnels” from the “Category” panel.For “Host Name”, enter the hostname / domain or IP of the server you want to connect to.Follow these steps to set up an SSH tunnel with PuTTY:: You will also need the hostname or IP address of the remote SSH server, as well as the username and password (or other authentication method) for an account on that server. To use SSH tunneling with PuTTY, you will need to have a working installation of PuTTY on your computer. In a future article, we will go through how to use Putty to establish a socks proxy as another sort of tunneling. Under this approach, all other traffic would proceed normally, and in order to use the tunnel, you would need to directly connect to the tunnel’s local IP address and port. This article will describe one kind of static SSH tunneling, in which every communication that passes through the tunnel is forwarded to a certain destination host. This is useful for applications like MySQL where remote server access is necessary, but the application’s default means of remote access is less secure than SSH. SSH tunneling, also known as SSH port forwarding, maps a local IP and port to a remotely accessible resource, allowing local applications to make remote connections in a secure manner. What is an SSH Tunnel?Īn SSH Tunnel provides an encrypted connection between a local computer and remote server using the SSH protocol. When you’ve finished following along, you’ll be able to begin using SSH tunneling, gaining a useful tool for your IT toolbox. In this article, we’ll walk you through the process of creating an SSH tunnel with PuTTY. ![]() ![]() ![]() This also allows you to connect to things that may be blocked locally, that your remote server has access to. Using this software, you can relay network traffic securely from one network site to another, guarding your information against hacking and eavesdropping. SSH tunneling with PuTTY is a useful tool for encrypting your network traffic or accessing services on other networks securely.
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