Commands

Get Router IP

bash

netstat -nr | grep default

bash

Destination        Gateway            Flags               Netif Expire
default            172.30.109.1       UGScg                 en1
default            link#24            UCSIg           bridge100      !
default            link#26            UCSIg           bridge101      !

Get Public IP

bash

curl ifconfig.me

bash

curl icanhazip.com

eth0 vs en0/1

Ethernet Interface
eth0 old name
en0/1 modern name(macOS)