Putty Key Generator Ssh 2 Rsa
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Gitで使用するような「SSH2 RSA」をParametersで選択したい場合; 昔の画面だと SSH-2 RSA が選択できるようですが、 Release 0.70 だと SSH-2 RSA がありません; RSA はあるんですよね; これが、SSH-2 RSA のことですので、こちらを選択. May 10, 2015 PuTTY Key Generator, a.k.a. PuTTYgen (an RSA and DSA key generation utility), is a free utility which generates keys for use with PuTTY SSH client, PuTTY authentication Pageant, and other programs in the PuTTY line. It explicitly mentions that all key types (with obvious exception of the 'SSH-1 (RSA)') are for SSH-2. The current version of the SSH protocol, SSH-2, supports several different key types. PuTTYgen can generate: An RSA key for use with the SSH-2 protocol. A DSA key for use with the SSH-2 protocol. An ECDSA (elliptic curve DSA) key for use with. Click SSH-2 RSA as the type of key to generate. Note: Leave the number of bits in a generated key value at 1024. Click Generate and then move the cursor around the blank area of the Key section to generate the random characters that create a unique key.
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SSH keys are one of the most secure SSH authentication options. It is definitely more secure than the usual SSH password authentication. Therefore, it is highly recommended to use SSH Key authentication method for connections to your servers.
With password authentication, you can connect to your server from any location, you only need to fill in your password. However, if your password gets leaked, it is a major risk as anyone who knows your password will be able to get into the server.
SSH Key authentication only allows connections from clients whose key matches the one on the server. Basically, you generate a key pair (private key and public key). The private key is placed on your local machine and the public key is uploaded to the server. When connecting to the server, a validation of these two keys is made and if the key pair passes the validation you are allowed to connect. Of course, you can upload keys of multiple users so that you or other authorized users would be able to connect to the server from different computers.
As you can see this is a much safer connection method. In this tutorial, we will focus on Windows users who use PuTTY for connections to the server and show how to generate PuTTYSSH Keys. If you want to generate SSH Keys on Linux or Mac, see this tutorial.
What you’ll need
Before you begin this guide you’ll need the following:
- Access to your Linux server / VPS
- PuTTY and PuTTYgen installed on your computer (Download here)
Step 1 — Downloading PuTTYgen
Most of you have PuTTY installed on your computers already, however, to generate SSH Keys you also will need PuTTYgen.
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- Download PuTTYgenhere
- You should be able to see this file downloaded:
No installation is required for PuTTYgen, it will run when you execute the file.
Step 2 — Generating your SSH Key pair
- Open up PuTTYgen by double clicking on the puttygen.exe file you have downloaded in Step 1.
- You should be able to see a window like this:
- Before generating your SSH Key pair, you can edit some settings, for example, key length, however, in most cases the default options will work just fine.
- Generate your SSH Key pair by clicking the Generate button.
- When the progress bar starts loading, move your mouse randomly across the area to load up the bar and generate your key pair.
- Your public SSH key will be displayed on the screen:
- For additional security it is highly recommended to think of a passphrase for your SSH key (However, you can also leave it empty):
- Save your private key to any desired location on your computer and name it anything you like.
- Save your public key to the same location on your computer and name it anything you like.
Putty Key Generator Ssh 2 Rsa Download
And that is it, you have generated your SSH Key pair. The private key will stay on your computer (do not provide it to anyone) while your public key needs to be uploaded to the server you wish to connect to.
Step 3 — Setting up your private key on PuTTY
In order for the server to recognize your computer when connecting from PuTTY, you need to attach the private key to PuTTY.
- Open up PuTTY.
- Navigate to Connection -> SSH -> Auth in the left sidebar.
- Browse for your private key file in the field Private key for authentication
- Select the private key file with .ppk ending and click Open.
Step 4 – Adding public key to server
Lastly, you need to upload your public key to the server:
- On your local computer, open public key file (id_rsa.pub) you generated in Step 2 with any text editor and copy its contents (public key).
- Connect to your VPS using Putty. See this guide for detailed steps.
- If .ssh folder does not exist, create it together with authorized_keys file with the following command:
mkdir ~/.ssh touch ~/.ssh/authorized_keys - Secure SSH Key file by changing permissions:
chmod 0700 ~/.ssh; chmod 0644 ~/.ssh/authorized_keys - Open authorized_keys file with vim text editor:
vim ~/.ssh/authorized_keys - Press i key on your keyboard and right mouse button to paste the public key.
- Press Esc button and type in
:x, hit Enter button. This command will save changes made to the file.
That is it, you can now use SSH keys instead of SSH password authentication to connect to your VPS.
Conclusion
You have learned how to generate PuTTY SSH Keys using PuTTYgen. This will make your connection to the server a lot more secure and convenient as you will not need to fill in the password each time. We recommend using this way of SSH authentication at all times and disable password authentication for good to completely secure your server. To find out how to completely disable SSH Password authentication on your server and use SSH Key authentication instead, follow this tutorial: How to disable SSH Password authentication on VPS.
Name
puttygen - public-key generator for the PuTTY tools
Synopsis
Description
puttygen is a tool to generate and manipulate SSH public and private key pairs. It is part of the PuTTY suite, although it can also interoperate withthe private key formats used by some other SSH clients.
When you run puttygen, it does three things. Firstly, it either loads an existing key file (if you specified keyfile), or generates a new key(if you specified keytype). Then, it optionally makes modifications to the key (changing the comment and/or the passphrase); finally, it outputs thekey, or some information about the key, to a file.
All three of these phases are controlled by the options described in the following section.
Options
In the first phase, puttygen either loads or generates a key. The options to control this are:
In the second phase, puttygen optionally alters properties of the key it has loaded or generated. The options to control this are:
In the third phase, puttygen saves the key or information about it. The options to control this are:
If no output type is specified, the default is private.
The following options do not run PuTTYgen as normal, but print informational messages and then quit:
- Putty Key Generator Ssh 2 Rsa Free
To generate an SSH-2 RSA key pair and save it in PuTTY's own format (you will be prompted for the passphrase):To generate a larger (2048-bit) key:To change the passphrase on a key (you will be prompted for the old and new passphrases):To change the comment on a key:To convert a key into OpenSSH's private key format:To convert a key from another format (puttygen will automatically detect the input key type):To display the fingerprint of a key (some key types require a passphrase to extract even this much information):To add the OpenSSH-format public half of a key to your authorised keys file:
Putty Key Generator Ssh 2 Rsa 1
Bugs
Ssh Key Rsa Format
There's currently no way to supply passphrases in batch mode, or even just to specify that you don't want a passphrase at all.