Issues with serial communication.

[paulsonmathew21]

I have programmed my Arduino Nano board with the challenge binary and found out the baud rate using Logic analyzer. I tried connecting to the target from windows as well as linux machines and was able to get the initial console of target. I could not enter or ever able to read the challenge value from the target. what could be the possible reason?

[void-m4110c]

It is very likely that this has to do with your terminal. In "minicom" for example, you have to send a newline character after the linefeed character.
This can be done by entering control-j followed by control-m right after the string you want to send.