.. _system: System ====== After a basic system setup by setting up :ref:`interfaces-addresses`, VyOS should be ready for further configuration which is described in this chapter. Host Information ---------------- This section describes the system's host information and how to configure them, it covers the following topics: * Host name * Domain * IP address * Default gateway * Aliases Host Name ^^^^^^^^^ A hostname is the label (name) assigned to a network device (a host) on a network and is used to distinguish one device from another on specific networks or over the internet. Set a system host name: .. code-block:: sh set system host-name .. note:: Only letters, numbers and hyphens are allowed. Show host name: .. code-block:: sh show system host-name Delete host name: .. code-block:: sh delete system host-name Example: Set system hostname to 'RT01': .. code-block:: sh set system host-name RT01 commit show system host-name host-name RT01 Domain Name ^^^^^^^^^^^ A domainname is the label (name) assigned to a computer network and is thus unique! Set the system's domain: .. code-block:: sh set system domain-name .. note:: Only letters, numbers, hyphens and periods are allowed. Show domain: .. code-block:: sh show system domain-name Remove domain name: .. code-block:: sh set system delete domain-name Example: Set system domain to example.com: .. code-block:: sh set system domain-name example.com commit show system domain-name domain-name example.com Static host mappings ^^^^^^^^^^^^^^^^^^^^ How to assign IPs to interfaces is described in chapter :ref:`interfaces-addresses`. This section shows how to statically map a system IP to its host name for local (meaning on this VyOS instance) DNS resolution: .. code-block:: sh set system static-host-mapping host-name inet Show static mapping: .. code-block:: sh show system static-host-mapping Example: Create a static mapping between the system's hostname `RT01` and IP address `10.20.30.41`: .. code-block:: sh set system static-host-mapping host-name RT01 inet 10.20.30.41 commit show system static-host-mapping host-name RT01 { inet 10.20.30.41 } Aliases ******* One or more system aliases (static mappings) can be defined: .. code-block:: sh set system static-host-mapping host-name alias Show aliases: .. code-block:: sh show system static-mapping Delete alias: .. code-block:: sh delete system static-host-mapping host-name alias Example: Set alias `router1` for system with hostname `RT01`: .. code-block:: sh set system static-host-mapping host-name RT01 alias router1 commit show system static-host-mapping host-name RT01 { alias router1 inet 10.20.30.41 } Default Gateway/Route ^^^^^^^^^^^^^^^^^^^^^ In the past (VyOS 1.1.8) used a gateway-address configured in the system tree (`set system gateway-address `) this is no longer supported and existing configurations are migrated to the new CLI commands. It is replaced by inserting a static route into the routing table using: .. code-block:: sh set protocols static route 0.0.0.0/0 next-hop Delete default route fomr the system .. code-block:: sh delete protocols static route 0.0.0.0/0 Show default route: .. code-block:: sh vyos@vyos$ show ip route 0.0.0.0 Routing entry for 0.0.0.0/0 Known via "static", distance 1, metric 0, best Last update 3d00h23m ago * 172.16.34.6, via eth1 System Users ------------ VyOS supports two levels of users: admin and operator. The operator level restricts a user to operational commands and prevents changes to system configuration. This is useful for gathering information about the state of the system (dhcp leases, vpn connections, routing tables, etc...) and for manipulating state of the system, such as resetting connections, clearing counters and bringing up and taking down connection oriented interfaces. The admin level has all of the capabilities of the operator level, plus the ability to change system configuration. The admin level also enables a user to use the sudo command, which essentially means the user has root access to the system. Creating Login User Accounts ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Create user account `jsmith`, with `admin` level access and the password `mypassword` .. code-block:: sh set system login user jsmith full-name "Johan Smith" set system login user jsmith authentication plaintext-password mypassword set system login user jsmith level admin The command: .. code-block:: sh show system login will show the contents of :code:`system login` configuration node: .. code-block:: sh user jsmith { authentication { encrypted-password $6$0OQHjuQ8M$AYXVn7jufdfqPrSk4/XXsDBw99JBtNsETkQKDgVLptXogHA2bU9BWlvViOFPBoFxIi.iqjqrvsQdQ./cfiiPT. plaintext-password "" } full-name "Johan Smith" level admin } SSH Access using Shared Public Keys ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The following command will load the public key `dev.pub` for user `jsmith` .. code-block:: sh loadkey jsmith dev.pub .. note:: This requires uploading the `dev.pub` public key to the VyOS router first. As an alternative you can also load the SSH public key directly from a remote system: .. code-block:: sh loadkey jsmith scp://devuser@dev001.vyos.net/home/devuser/.ssh/dev.pub Syslog ------ Per default VyOSs has minimal syslog logging enabled which is stored and rotated locally. Errors will be always logged to a local file, which includes `local7` error messages, emergency messages will be sent to the console, too. To configure syslog, you need to switch into configuration mode. Logging to serial console ^^^^^^^^^^^^^^^^^^^^^^^^^ The below would log all messages to :code:`/dev/console`. .. code-block:: sh set system syslog console facility all level all Use the **[tab]** function to display all facilities and levels which can be configured. .. code-block:: sh vyos@vyos# set system syslog console facility Possible completions: > all All facilities excluding "mark" > auth Authentication and authorization > authpriv Non-system authorization > cron Cron daemon > daemon System daemons > kern Kernel > lpr Line printer spooler > mail Mail subsystem > mark Timestamp > news USENET subsystem > protocols depricated will be set to local7 > security depricated will be set to auth > syslog Authentication and authorization > user Application processes > uucp UUCP subsystem > local0 Local facility 0 > local1 Local facility 1 > local2 Local facility 2 > local3 Local facility 3 > local4 Local facility 4 > local5 Local facility 5 > local6 Local facility 6 > local7 Local facility 7 vyos@vyos# set system syslog console facility all level Possible completions: emerg Emergency messages alert Urgent messages crit Critical messages err Error messages warning Warning messages notice Messages for further investigation info Informational messages debug Debug messages all Log everything Logging to a custom file ^^^^^^^^^^^^^^^^^^^^^^^^^ Logging to a custom file, rotation size and the number of rotate files left on the system can be configured. .. code-block:: sh set system syslog file facility level set system syslog file archive file set system syslog file FILENAME archive size The very same setting can be applied to the global configuration, to modify the defaults for the global logging. Logging to a remote host ^^^^^^^^^^^^^^^^^^^^^^^^ Logging to a remote host leaves the local logging configuration intact, it can be configured in parallel. You can log ro multiple hosts at the same time, using either TCP or UDP. The default is sending the messages via UDP. **UDP** .. code-block:: sh set system syslog host 10.1.1.1 facility all level all set system syslog host 10.1.1.1 facility all protocol udp **TCP** .. code-block:: sh set system syslog host 10.1.1.2 facility all level all set system syslog host 10.1.1.2 facility all protocol tcp Logging to a local user account ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If logging to a local useraccount is configured, all defined log messages are display on the console if the local user is logged in, if the user is not logged in, no messages are being displayed. .. code-block:: sh set system syslog user facility level