Re: Straightforward "Non-NAT" Routing

[Jan Johansson <jan@wenf.org>]

That would be a bridge I belive try reading brconfig(8).


On Thu, Dec 07, 2000 at 07:32:33AM +0000, Chris Lewis wrote:
> Hiya,
> 
> I've recently installed an OpenBSD firewall into my network topology, 
> currently using NAT to provide service to my internal network. However, 
> this setup is soon to become deprecated, as my ISP have now allocated me 15 
> usable external IP addresses. The current network topology is as follows:
> 
> Leased Line Router -> OpenBSD Firewall (NAT from external IP to Internal 
> IPs) -> Internal network (192.168.1.0)
> 
> With the aquisition of the new external IPs, I'd like to give every 
> internal machine one of those external IPs.. so that they are no longer 
> running on the 192.168.1.0 range. My problem is, I don't know how to pass 
> packets using those external IPs straight through the OpenBSD firewall out 
> to the router (which itself has one of those external IPs). I know this can 
> be done with NAT bimap rules, but that involves leaving the internal 
> network on the private (192.168.1.0) IP range.
> I'm assuming this is just a straightforward routing function, but can't 
> find a tool in the default install that would let me just pass through the 
> packets. Any ideas? :-)
> 
> Sorry if this has been long winded.
> 
> Thanks in advance,
> Chris Lewis
> 
>