This setup will emulate a common printserver box: accept raw data at port 9100 and stream the data to a print queue of your choice.
This is useful if your Windows printer driver does not allow networkprinting with ipp or http.
/etc/services
[...] # Local services cups_prn-ep4400 9100/tcp # socket printing
/etc/xinet.d/prn-epson4400
service cups_prn-ep4400
{
socket_type = stream
port = 9100
protocol = tcp
wait = no
user = lp
server = /usr/bin/lp
server_args = -d prn-ep4400
}