Re: Multiple Nics with DHCP on a firewall

From: Duane Arnold (darnold92@Insightbb.com)
Date: 12/04/02 

From: "Duane Arnold" <darnold92@Insightbb.com>
Date: Wed, 04 Dec 2002 00:53:19 GMT

Get a router and use MAC address cloning with one computer the ISP knows
about. The router can clone the computer's MAC address and the all computers
can use the same IP from the ISP.

http://www.homenethelp.com/web/explain/about-NAT.asp

Duane :)

"Don Flyer" <dflyers@hotmail.com> wrote in message
news:fef87ace.0212031539.2c77845e@posting.google.com...
> We have a small situation which we are looking for help on.
>
> We have switched isp to a new company which offers 5 static ip
> addresses. With our old isp we had all 5 ip's hard code to one nick
> in our firewall and were able to route to the different ip's through
> port routing no problem.
>
> With the new isp our ip address is assigned through DHCP wich requires
> a registration of each mac address on the network. That way an ip
> address is assigned to an mac address. There is no way to hard code
> the ip address. So we have to have a seperate nic for each address.
> Windows 2000 seems to have problems dealing with multi homed systems
> as some of the ip's we have, have seperate gateways. We are using
> windows based firewalls..
>
> http://support.microsoft.com/default.aspx?scid=kb;en-us;175767
>
> The problems we have is
>
> 1. Getting 5 nics on one pc working properly
>
> 2. When we have multiple nics running, we cannot perform simple port
> routing. it only works on one of the nics.
>
> I have tried to get iptables up and running but a similar situation
> occurs. The routing fails with multiple gateways. There may be a way
> with iptables and linux, but it may be above me.
>
> I was wondering if anyone may have a similar setup, or may have some
> recomendations on setup or products that may help. Running multiple
> firewalls on seperate boxes seems silly.
>
> Thanks for any help.
>
> Don Flyer

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