VyOS is a single network OS, with a linux-based kernel, that has features such as routing, Firewall and NAT, Network Services such as DHCP and DNS, and it is fully open source.

Usage

• Most configuration changes in vyos can be made in configuration mode which can be entered with the configure command.
• Configuration mode can be exited with exit
• Changes made in configuration mode can be applied with commit and saved with save
• Configuration settings can be set in vyos while in configuration mode using set
  • Forwarding Ex: set service dns forwarding listen-address 172.16.50.2 is used to set the listen address for dns forwarding to 172.16.50.2
  • Set Interface Address Ex: set interfaces ethernet eth0 address 10.0.17.133/24 is used to set the IP address of the eth0 network interface
  • Set DNS Ex: set system name-server 10.0.17.2 is used to set DNS server that the system uses.
  • Set hostname Ex: set system host-name HOSTNAME
  • Ex: set system gateway-address 10.0.17.2