The default VyOS user account (vyos), as well as newly created user accounts, have all capabilities to configure the system. All accounts have sudo capabilities and therefore can operate as root on the system.
Both local administered and remote administered RADIUS accounts are supported.
Key Based Authentication¶
It is highly recommended to use SSH key authentication. By default there is
only one user (
vyos), and you can assign any number of keys to that user.
You can generate a ssh key with the
ssh-keygen command on your local
machine, which will (by default) save it as
Every SSH key comes in three parts:
ssh-rsa AAAAB3NzaC1yc2EAAAABAA...VBD5lKwEWB firstname.lastname@example.org
Only the type (
ssh-rsa) and the key (
AAAB3N...) are used. Note that the
key will usually be several hundred characters long, and you will need to copy
and paste it. Some terminal emulators may accidentally split this over several
lines. Be attentive when you paste it that it only pastes as a single line.
The third part is simply an identifier, and is for your own reference.
Every SSH public key portion referenced by <identifier> requires the configuration of the <type> of public-key used. This type can be any of:
You can assign multiple keys to the same user by using a unique identifier per SSH key.
authorized_keysman page for details of what you can specify here. To place a
"character in the options field, use
", for example
from="10.0.0.0/24"to restrict where the user may connect from when using this key.
SSH keys can not only be specified on the command-line but also loaded for a given user with <username> from a file pointed to by <location>. Keys can be either loaded from local filesystem or any given remote location using one of the following URIs:
<file>- Load from file on local filesystem path
scp://<user>@<host>:/<file>- Load via SCP from remote machine
sftp://<user>@<host>/<file>- Load via SFTP from remote machine
ftp://<user>@<host>/<file>- Load via FTP from remote machine
http://<host>/<file>- Load via HTTP from remote machine
tftp://<host>/<file>- Load via TFTP from remote machine
In the following example, both User1 and User2 will be able to SSH into
VyOS as user
vyos using their very own keys. User1 is restricted to only
be able to connect from a single IP address.
set system login user vyos authentication public-keys 'User1' key "AAAAB3Nz...KwEW" set system login user vyos authentication public-keys 'User1' type ssh-rsa set system login user vyos authentication public-keys 'User1' options "from="192.168.0.100"" set system login user vyos authentication public-keys 'User2' key "AAAAQ39x...fbV3" set system login user vyos authentication public-keys 'User2' type ssh-rsa
In large deployments it is not reasonable to configure each user individually on every system. VyOS supports using RADIUS servers as backend for user authentication.
If you want to have admin users to authenticate via RADIUS it is
essential to sent the
Cisco-AV-Pair shell:priv-lvl=15 attribute. Without
the attribute you will only get regular, non privilegued, system users.