Find an IP address
How to find an unknown static IP address of a device:
- Install, and run Wireshark on your PC or laptop, the configured IP address is not important
- Connect the device with an ethernet cable. Auto-MDIX should let it link, if not, try a crossover cable
- Power up the device (or reboot it) and watch the Wireshark packet capture (PCAP) output for activity
- if the device has a static IP, it will broadcast it in ARP messages, otherwise you'll see DHCP messages
- you are going to have to figure out the subnet mask, though most of the time this will be self evident
Example:
![ipobarr1.png](/images/findip1.png)
1. The device will broadcast its static IP address in various messages
![ipobarr2.png](/images/findip2.png)
2. The PC is now on same network and can successfully ping the device
![ipobarr3.png](/images/findip3.png)
3. If the device is set to use DHCP, messages are sent from 0.0.0.0
![ipobarr1.png](/images/findip1.png)
![ipobarr2.png](/images/findip2.png)
![ipobarr3.png](/images/findip3.png)