I would like to copy data flow (not redirect!!!) from 1567 port
to another 1194 port on same computer. The 1567 Port already binded by Scream program (it is bisy). Is it possible to do it by iptables or for it nesessary another programs? Can you help me in the decision of this question?
Well, if the port is bound to the Scream program, no other users can bind it. Do you want to copy the flow into Scream on every connecting service? There is a tool, tcp_relay.c, that listens on one port and for every connection, spins off a child that connects to $2 port $3 and forwards all data both ways, a sort of firewall proxy. You can monitor Scream with truss/tusc/strace as it runs and see all the system calls it does.