SSH / Telnet Software

Telnet is an application layer protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols. The term telnet is also used to refer to the software that implements the client part of the protocol. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server.

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When it comes to security, there are always trade-offs between security and convenience/ease of administration. This article examines some of the main pros and cons of using key authentication vs password authentication for hosting an SFTP server.
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Hello to you all,

I hear of many people congratulate AWS (Amazon Web Services) on how easy it is to spin up and create new EC2 (Elastic Compute Cloud) instances, but then fail and struggle to connect to them using simple tools such as SSH (Secure Shell) and RDP (Remote Desktop Protocol) and their feelings quickly turn to frustration. 

Depending on your deployment method of your EC2 instances you may need to connect to them to perform additional configuration, install applications or to troubleshoot and incidents that may occur.  Without having a working method of connecting locally to your EC2 instances would prevent you from having full manageability of that host.

This Article has been written to cover the most common configuration problems that prevent connectivity between you and your EC2 instance.
 

Default or Non Default VPC (Virtual Private Cloud)?


Default VPC: Every AWS account comes with a Default VPC already created, this allows users to immediately deploy EC2 instances within this VPC and connect to it.  Simple you may think, and you would be right, many of the AWS networking components have already been set up on your behalf allowing you to connect to your instances with relative ease. However, these same components that are pre-configured take away some of the detailed design that your corporate infrastructure may require.  It comes with a predefined IP CIDR (Classless Inter-Domain Routing) block assigned which might not suit …
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Secure Shell (SSH) is a network protocol for secure data communication, mainly used to administer remote Unix / Linux servers via command line. But it also allows the user to open a secure tunnel between a client and a server where he can send any kind of network traffic through.  

Many customers I work for are using a SSH hop server that is sitting behind a firewall. The hop server is the main point of entry to a certain network area, similar to a proxy.

The firewall is configured with port forwarding to forward any SSH requests directly to a specific hop server. From there you can then connect via SSH to another host in order to remotely administer that server via command line. This kind of setup allows the administrator to more effectively control who and from where people can connect to a server.

If you need to do quite a lot of work on the remote servers that are sitting behind the hop server, it can get quite annoying to go through all the steps to connect, because for every connection you would need to connect first to the hop server and then connect to the desired remote server. It gets a bit more complicated if you try to send files from your client directly to the remote server, as you would need to send the file first to the hop server and from there to the remote server. Especially for bigger files you may not want to store them on the hop server first.

OpenSSH has some very nice features where it will use the hop server as a SSH proxy.

Prerequisites

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by:Eric AKA Netminder
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un1x86.

Congratulations; your article has been published. Thank you for a nice explanation.

ericpete
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We all know how boring and exhausting it is to transfer huge web projects developed locally to a webserver simply via FTP.

The File Transfer Protocol is a really nice solution if you need to transfer small amounts of files, but if you're planning to transfer your local development on your webserver via FTP it can take literally hours. For example a Joomla! installation package extracted on your local machine and transfered to the webdirectory where it's going to be installed takes more than ONE hour via the open source FTP client called Filezilla.

This is wasted time that you could have spent more productively going through the installation process, setting up a database connection for your project and have written your first articles in your blog or CMS.

There are several approaches to avoid long transfer time. I will go through one of them, where the good old FTP-client is still involved but where you will need an connection to your webserver via SSH (Secure Shell), another very useful and encrypted network protocol.

What you need:
Filezilla or similar FTP client
Terminal App on a Mac or the comand line on a Windows System

In our common scenario you likely have a local webserver installed where you already have a development of your webproject and what you need to do now is to create a zip file of the folder where your …
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SSH / Telnet Software

Telnet is an application layer protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols. The term telnet is also used to refer to the software that implements the client part of the protocol. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server.

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SSH / Telnet Software