NAT possible with single interface box?

[Ultima]

Please provide netstat -nr. If you have more in pf.conf, please provide
this too.

On Mon, Mar 12, 2018, 6:28 AM Rick van der Zwet <info at rickvanderzwet.nl>
wrote:

> Hi,
>
> Could NAT translation be done with a single interface system without the
> use of VLANs?
>
> I have ,a rather odd, (simplified) network configuration:
>    - single interface system (Router) which has two private IP addresses
> 172.16.0.10/24 and 192.168.1.10/24.
>    - The gateway (to the internet) is found at 192.168.1.1
>    - The Client with IP 172.16.0.20/24
> The Client (cannot be modified) is supposed to connect to the internet
> via the Router.
>
>
> My pf rules on Router are:
>    nat on sis0 inet proto tcp from 172.16.0.0/24 to !172.16.0.0/24 ->
> 192.168.1.10
>
>
> Router is configured to allow routing:
>    net.inet.ip.forwarding=1
>
>
> pf.conf(5) tell me it will do translation on pass through packets:
>       Translation rules apply only to packets that pass through the
> specified
>       interface,        and if no interface is specified, translation is
> applied
> to
>       packets on        all interfaces.
>
>
> Looking at tcpdump of the router I do not see packages been translated
> yet only being forwarded, which leaves me wondering could this be done
> at all?
>
> Best regards,
> -Rick
>
>
>
>
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