Adding static route
sudo route add -net 192.168.5.0 netmask 255.255.255.0 gw 192.168.1.254
To remove static route
route sudo route del -net 192.168.5.0 netmask 255.255.255.0 gw 192.168.1.254
Network: 192.168.5.0/24
Gateway: 192.168.1.254 (anoter router hosting new network 192.168.5.0/24)
Netmask: 255.255.255.0
To make it permanent,
sudo nano /etc/network/interfaces
# WAN interface auto eth1 iface eth1 inet static address 202.xx.xx.xx gateway 202.xx.xx.xx netmask 255.255.255.240 dns-nameservers 8.8.8.8 # LAN interface auto eth0 iface eth0 inet static address 192.168.1.240 netmask 255.255.255.0post-up route add -net 192.168.5.0 netmask 255.255.255.0 gw 192.168.1.254
post-up route add -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.1.254
Verify by checking the route
route ip route netstat -rn
Verify your IP and DNS server
hostname -I hostname -d