You cannot do this with just ipchains. You need some sort of port
forwarding if you are interested in directly telneting to the machine
10.1.1.5. Since the address 10.1.1.5 is private address, it cannot be
routed on the internet.
So you will need to have additional package called ipmasqadm. You can
setup a rule like
ipmasqadm autofw -A -r tcp 10000 23 -h 10.1.1.5
on 10.1.1.11 machine. So all the incoming conncetions on port 10000
get forwarded to port 23 of 10.1.1.5. So now you can telnet from
internet 10 a.b.c.d on port 10000 and it will get forwarded automatically
to 10.1.1.5.
Or else you always have the option of telneting to a.b.c.d and then
to 10.1.1.5.
Amitay.
On Thu, Feb 24, 2000 at 10:54:06PM +0530, wilson wrote:
> hi,
> I am implenting linux firewall (RedHat 6.0) . I have two NIC , one
> having a public internet ip address a.b.c.d and the other
> having private ip address 10.1.1.11
>
> My aim is to telnet to ip address 10.1.1.5 from
> the internet.
>
> So I have to configure that when I telnet to
> a.b.c.d from the internet, the linux firewall should send the
> request to 10.1.1.5
>
> ______ ______
> ------------------|| ||-----------------|| ||
> INTERNET a.b.c.d || ||
> 10.1.1.11 10.1.1.5 || ||
> ||_____
> || ||_____ ||
>
>
> what is the ipchain rule from implementing this ?
>
> thanks.
>
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Amitay.
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