#Vyos
How to Configure Source NAT on vyos router :
set interfaces ethernet eth0 address 'dhcp'
set interfaces ethernet eth1 address '192.168.10.1/24'
set nat source rule 1 outbound-interface 'eth0'
set nat source rule 1 source address '192.168.10.0/24'
set nat source rule 1 translation address 'masquerade'