You will need to research and find the solution that works best for your console application. Note: There are a variation on console application used from Windows. In this example, we will not specify as passphrase. Myesa.local> ssh-keygen example for WindowsĬomplete the following steps to set up your a Windows workstation (or server) to connect to the ESA without a password.
Putty ssh key authentication password#
Notice the password prompt is removed, and access is directly granted: myesa.local> exitĬonnection to 192.168.0.199 ssh to myesa.local ssh-rsa AAAAB3NzaC1yc2EAA.rQludntknw the operation you want to perform:Ĥ) Exit out of the appliance, and re-login. KgzF7joke9niLfpf2sgCTiFxg+qZ0rQludntknw installed keys for admin:ġ. Please enter the public SSH key for authorization. USER - Switch to a different user to edit.
Welcome to the Cisco C100V Email Security Virtual ApplianceĬhoose the operation you want to perform: Notice the password prompt during login: $ ssh to myesa.local KgzF7joke9niLfpf2sgCTiFxg+qZ0rQludntknw Login to your appliance and configure your ESA to recognize your workstation (or server) using the public SSH key that you created in #1, and commit the changes. Zz2uYnx1llxbVtGftbWVssBK3LkFp9f0GwDiYs7LsXvQbTkixrECXqeSrr+NLzhU5hf6Įb9Kn8xjytf+eFbYAslam/NEfl9i4rjide1ebWN+LnkdcE5eQ0ZsecBidXv0KNf45RJa T54Wl2wUS36NLxm4IO4Xfrrb5bA97I+ZA4YcB1l/HsFLZcoljAK4uBbmpY5kXg96A6Wf Ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDJg9W3DeGf83m+E/PLGzUFPalSoJz5F (*the above was generated from an Ubuntu 14.04.1)Ģ) Open the public key file (id_rsa.pub) created in #1 and copy the output: $ cat. Your identification has been saved in /home//.ssh/id_rsa.
In this example, we will not specify as passphrase.ġ) On your workstation (or server), generate a private key using the Unix command ssh-keygen: $ ssh-keygen -b 2048 -t rsaĮnter file in which to save the key (/home//.ssh/id_rsa):Įnter passphrase (empty for no passphrase): ssh-keygen example for Linux/UnixĬomplete the following steps to set up your a linux/unix workstation (or server) to connect to the ESA without a password. OpenSSH contains a tool called ssh-agent which simplifies this process. On more secure systems (like a machine where you are the only user, or a machine at your home where no strangers will have physical access) you can simplify this process either by creating an unencrypted private key (with no passphrase) or by entering your passphrase once and then caching the key in memory for the duration of your time at the computer. Before SSH can read your private key in order to perform the public key authentication you'll be asked to supply the passphrase so that the private key can be decrypted. On a shared system where you do not have root this can be accomplished by encrypting the private key with a passphrase, which functions similarly to a password. It does, however, mean that you need to protect the privacy of the private key. This is done at the protocol level inside SSH and happens automatically. That remote system is then able to authenticate your user ID, and allow you to login just by having you demonstrate that you have access to the private half of the keypair. It's easy to see how this technique could be used to authenticate.Īs a user, you can generate a keypair and then place the public half of the key on a remote system, such as your ESA. In this way, having access to the public half of a key allows you to send secret information to anyone with the private half, and to also verify that a person does in fact have access to the private half. With PKI, a special "key" is generated which has a very useful property: Anyone who can read the public half of the key is able encrypt data which can then only be read by a person who has access to the private half of the key.
Public-key authentication (PKI) is an authentication method that relies on a generated public/private keypair.
Putty ssh key authentication how to#
How to configure SSH Public Key Authentication for login to the ESA without a password This document describes how to generate a private secure shell (SSH) key and use that for username and authentication when logging into the command line interface (CLI) on the Cisco Email Security Appliance (ESA).
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