Detecting peripherals on wired modem

I want to be able to detect tanks on a network using openp how can i make it automatic so it doesnt matter on its name?

check out peripheral.getNames() it returns a table listing all the names of attached network peripherals as well as ones on the side of the computer.
http://www.computercraft.info/wiki/Peripheral.getNames

oohh nice thanks

Assuming "local p = peripheral.wrap(side)" is wrapping a wired modem
You can get all the wired peripherals with the "p.getNamesRemote()" method.
That doesn't include peripherals placed beside the computer.