There are many ways, for example:
- "IfConfig" command from the shell
- SYS:Tools/NetStat from the icon and then look the Interfaces tab
- "SYS:Tools/NetStat -F" command from the shell
- My scripts which parse the output from the previous commands to cleaner form: http://jpv.wmhost.com/jpv_software/ShowIPAddress-scripts.lha