If this is the case, it can be safely ignored for now. Note that your local SSH configuration file ( ~/.ssh/config) may not exist if you haven’t used it in the past.
![ubuntu openssh ubuntu openssh](https://candid.technology/wp-content/uploads/2021/03/ssh-1.jpg)
These commands will save backup copies of the files in their default location, but with the. sudo cp /etc/ssh/ssh_config /etc/ssh/ssh_config.bak.Before continuing it is a good idea create a backup of your existing configuration file so that you can restore it in the unlikely event that something goes wrong.Ĭreate a backup of the file using the following cp command: To set the majority of the hardening options in this tutorial. In addition to this file, some configurations may also be set using the local SSH configuration file for your user, located at ~/.ssh/config. Many of the hardening configurations for OpenSSH client are implemented using the global OpenSSH client configuration file, which is located at /etc/ssh/ssh_config. However, the configuration described in this step is a general, all-round secure configuration that should suit the majority of users. The exact hardening configuration that is most suitable for your client depends heavily on your own threat model and risk threshold. In this first step, you will implement some initial hardening configurations in order to improve the overall security of your SSH client. Once you have these ready, log in to your SSH client device as a non-root user to begin. A third-party device that you are permitted to access.A public service such as GitHub or GitLab.
![ubuntu openssh ubuntu openssh](http://i.ytimg.com/vi/ards0kakINw/maxresdefault.jpg)
![ubuntu openssh ubuntu openssh](https://ml3xklmbvgc7.i.optimole.com/Kw0TUQw-3IdcL3Fq/w:auto/h:auto/q:90/https://maheshtechnicals.com/wp-content/uploads/2020/01/How-To-Connect-Ubuntu-Server-VPS-Using-SSH-On-Android-OVH-Cloud-Hindi.jpg)
![ubuntu openssh ubuntu openssh](https://i.ytimg.com/vi/4WUbNSl5WCI/maxresdefault.jpg)
However, it is also important to consider security on the client-side, such as OpenSSH client. Significant effort is put into securing the server-side aspect of SSH, as SSH acts as the entry into your server.
UBUNTU OPENSSH SOFTWARE
Linux servers are often administered remotely using SSH by connecting to an OpenSSH server, which is the default SSH server software used within Ubuntu, Debian, CentOS, FreeBSD, and most other Linux/BSD-based systems. A previous version of this tutorial was written by Jamie Scaife.