I want to setup a specific port forwarding to trace the ip traffic between a macos9 and a hp net printer to debug a spooler problem.
I thought the port forwarding feature of linux/iptables would be nice to do that. But until now I wasn't able to get it running ;-(
May be some one can help here. The setup is quite simple.
* one class C net (192.168.10.0) * a linux box with one interface (eth0), kernel 2.4.24 and iptables 1.2.9 (192.168.10.156
* macos9 machine with 9.2.x (192.168.10...)
* HP laser printer with network interface (192.168.10.9)
I want to configure the Mac to print to the linux box. The linux box should do port forwarding to the hp printer. So I can use "ethereal" or what ever to dump the traffic.
Because it's not a firewall all chains have as default "accept".
I added the following rule (which seems not to be enough, cause the printing freezes):
iptables -t nat -A PREROUTING -p tcp --dport 515 \ -d 192.168.10.156/32 -j DNAT --to-dest 192.168.10.9:515
Any ideas?
thx + cu rasca
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