For Wireless
ipconfig getpacket en1
For Wired
ipconfig getpacket en0
From OS-X daily
You can also find your router address
ipconfig getoption en0 router
Your Name Server
ipconfig getoption en0 domain_name_server
Your IP Address
ipconfig getifaddr en0
Create an alias to a new IP address
ifconfig en0 alias 10.0.0.100/24
And to remove the alias
ifconfig en0 -alias 10.0.0.100
