Ip Forwarding Question

I need a little help with forwarding

Setup : Machine 1
Suse Linux 7.1 / Kernel 2.4.16-35
Iptables 1.2.6a
1 dynamic ip address
Apache 1.26

Machine 2
W95

I have client windows applications (running in var. countries)
which connect on port 2300 on the linux machine
I need to forward this port to the windows machine ,
where I have a server running ,which triggers a sql query
when a client connects and then sends back a result set to the connected client application.

How to correctly call iptables ?
something like :
iptables -t nat -A postrouting -o eth0 -j SNAT ........

Thanks for any help

iptables -A PREROUTING -p tcp --dport 2300 -i eth0 -j DNAT --to ipofwindows:porttoaccess

iptables -A POSTROUTING -o eth0 -j MASQUERADE

That might do it. Not sure if that will work so........Im not expert at iptables. I read this from a magazine.

you could always try a GUI app to set it up.

Alex

btw, you will need the relevant bits in the kernel for the nat stuff unless you didn't know.

Tried but it did not work .....

I have a feeling that the last rule may be wrong. It will need to be -o eth1 (your card going to the windows machine) and it may need an -i eth0 for the card connected to the net. so it will be
iptables -A POSTROUTING -i eth0 -o eth1 -j MASQUERADE

You'll have to look at the man page or on www.google.com/linux since my skills at iptables are shabby at best. The main structure should be there though.

Alex

p.s.Sorry I was no good but sometimes you need to admit ignorance before you can become informed. If you find a solution post it back so we know how to do it in future.

should be iptables -t nat -A ~~~

Regards,
Peter