bypas TelNet and/or FTP

Hai…. to all the experts….

This question might be bit unethical to post in this forum, but I always wanted to try this sort of a thin (purely for experiment purposes only)

When I’m chatting wit my friend online (in MSN or Gtalk) we trace eachothers IPs using the “netstat” command. And then scan the IP for open ports using “port scanner”. Even when I open my telnet port 23 and FTP port 21 (purposely) my friend or I cant login in to each other.

What is the reason for this? Is there any way to bypass this? PLZ help
Regards,
Harsha