finger daemon / nc fowarding error

For an assignment I'm trying to properly send a buffer overflow exploit with ncat in order gain root access on a vulnerable machine set up by the professor. I feel I created my egg right but I keep getting the same error when I pipe my egg exploit file to ncat. I've tried researching this error but have found nothing to what it means or how to overcome it. I'm not sure if my command is the best way to send an exploit to the finger daemon. My command

cat egg | nc hostname port

the ouput with error at the end

Welcome to an eggie Linux version 4.9.0-3-686-pae at hostname.lan !

 19:20:41 up 15 days,  4:29,  0 users,  load average: 0.00, 0.00, 0.00

fingerd: forwarding not allowed