Even after long searching and trying I'm not able to solve the following puzzle:
Client A --------------------------> Server B (172.26.15.15/24)
ssh -L 4321:localhost:4321 Server C (172.26.15.16/24)
- Client 'A' has a ssh tunnel, forwarding a:4321 to b (localhost):4321
- 'Server B' should forward all packets received on localhost:4321 to 'Server C:4321'
Can this be done with iptables
and, if so, can anybody give me a clue how?