Tinycore is here 12/1/2008! Welcome visitors.
I still don't understand what you mean - are you looking to monitor eth0 or wlan0 with tcpdump or wireshark maybe?
Maybe you mean syslog to a remote syslog server? Over ethernet you could try adding rsyslog=remote_syslog_server to your boot options.
but i can't find rsyslog on repository
What version and architecture are you using? Do you want to set up a TCL box to be a syslog client or server? Or one or more of each?