SSH – geekdecoder

SSH

SSH key that uses Ed25519 algorithm

May 15, 2020May 15, 2020 The Geek Decoder

Ready for a new key? You should be. The Ed25519 was introduced on OpenSSH version 6.5. It’s the EdDSA implementation using the Twisted Edwards curve. It offers a better security with faster performance compared to DSA or ECDSA. Some benefits:…

Administration SSH

Generate ssh keys on linux and use with PuTTY on Windows

August 10, 2018September 1, 2018 The Geek Decoder

Log into the Linux server as the user you are going to use to connect with ssh. Generate the key. ssh-keygen -t rsa -b 4096 -C “email@domain.com” Generating public/private rsa key pair. Enter file in which to save the key…

SSH

How To Create SSH Keys With PuTTY to Connect to CentOS7

April 21, 2018April 27, 2018 The Geek Decoder

Generating OpenSSH-compatible Keys for Use with PuTTY To generate a set of RSA keys with PuTTYgen: Start the PuTTYgen utility, by double-clicking on its .exe file; For Type of key to generate, select RSA; In the Number of bits in…

SSH

Log in with an SSH private key on Linux

September 9, 2017June 2, 2020 The Geek Decoder

Using a text editor, create a file in which to store your private key. This example uses the file private_key.txt. To edit the file in nano, type the following command # nano deployment_key.txt Paste the private key into the file.…

SSH

How can I keep my SSH sessions Alive

January 26, 2017June 27, 2018 The Geek Decoder

Here is how to keep your ssh session from freezing and how to keep ssh alive. Edit your ssh config file. Change to the following variables # nano /etc/ssh/sshd_config TCPKeepAlive yes ClientAliveInterval 60 ClientAliveCountMax 10000 Then, restart ssh On CentOS:…

Administration Security SSH

How to Secure SSH with Google Authenticator’s Two-Factor Authentication

August 26, 2014August 22, 2015 The Geek Decoder

Source: http://www.howtogeek.com/121650/how-to-secure-ssh-with-google-authenticators-two-factor-authentication/ Also, for CentOS: http://www.tecmint.com/ssh-two-factor-authentication/ Want to secure your SSH server with easy-to-use two-factor authentication? Google provides the necessary software to integrate Google Authenticator’s time-based one-time password (TOTP) system with your SSH server. You’ll have to enter the code…

SSH

ssh_exchange_identification: Connection closed by remote host

February 26, 2014August 22, 2015 The Geek Decoder

Error ssh_exchange_identification: Connection closed by remote host Solution: Restart ssh. service sshd restart

SSH

Change OpenSSH Port CentOS

February 14, 2014August 22, 2015 The Geek Decoder

Want to change the ssh port for ssh? Here is a good tutorial. (Note: If you are making these changes – ssh to the server and keep the terminal open as you make the changes. Test with a new terminal.…