Direct routing

[Dennis Olvany]

Karel Miklav wrote:
> I'd like to do something like described on the LVS pages 
> http://www.linuxvirtualserver.org/VS-DRouting.html, that is route
> requests to another server and answer from this second server
> directly to the client. How can I do it on FreeBSD?

You can use lsnat.

http://www.enterasys.com/products/whitepapers/load-sharing-nat/

-redirect_address localIP[,localIP[,...]] publicIP

 These forms of -redirect_port and -redirect_address are used
 to transparently offload network load on a single server and
 distribute the load across a pool of servers.	This function
 is known as LSNAT (RFC 2391).	For example, the argument

       tcp www1:http,www2:http,www3:http www:http

 means that incoming HTTP requests for host www will be trans-
 parently redirected to one of the www1, www2 or www3, where a
 host is selected simply on a round-robin basis, without
 regard to load on the net.

http://www.freebsd.org/cgi/man.cgi?query=natd