I did try that...exactly as you had it, there...I'll have to try again.

On 19 Jan 2002, Bret Hughes wrote:

> On Fri, 2002-01-18 at 23:51, Mike Burger wrote:
> > I'm sorry...feeble mind syndrome set in.
> > 
> > Try http://www.bubbanfriends.org/~mburger/fwscript.txt
> > 
> > Damn.
> > 
> 
> Better.
> 
> Did you say you already tried a version of this with the internal
> interface? g it would look like :
> 
> #
> # HTTP to the server
> #
> $IPTABLES -t nat -A PREROUTING -i eth0 -d 216.140.122.113 -p tcp --dport
> 80 -j DNAT --to 192.168.0.1
> $IPTABLES -A FORWARD -p tcp --dport 80 -m state --state NEW -d
> 192.168.0.1 -j ACCEPT
> #
> 
> I am thinking it would look like :
> 
> ## HTTP to the server from then internal network
> #
> $IPTABLES -t nat -A PREROUTING -i eth1 -d 216.140.122.113 -p tcp --dport
> 80 -j DNAT --to 192.168.0.1
> 
> I am thinking that the forwarding line in the original rule wouls take
> care of the forwarding thing.
> 
> 
> The reference I was refering to was in the nat how to
> http://netfilter.samba.org/unreliable-guides/NAT-HOWTO/NAT-HOWTO.linuxdoc-5.html
> 
> 
>  Since the DNAT rule is prerouting I honestly do not know what happens
> when a machine gets a packet directed to it on an interface for another
> machine with the same subnet.  Isn't there some sort of redirection
> thing that occurs?  Somthing like hey buddy you don't need to send me
> these packets they are on the same subnet we are all on.  then the src
> machine says huh?  I was sending this to 216....  not 192....  why are
> you telling me all this?  might be some arp or routing magic that needs
> to be done here.
> 
> I wish I had a test lab setup for this I would like to try it.
> 
> One of the reasons I wanted  to see this work is that I am about to
> build a new firewall for our office and am working on the network
> architechure.  I am seriously considering putting all publically
> availible services on a machine(s) in a DMZ setup like :
> 
> 
> internet  ------- firewall ----- DMZ net (192.168.3.0/24)
>                      |
>                      |
>                      |
>                  internal net
>                  192.168.0.0/24
> 
> THis type of setup will atleast get me around the very issues you are
> having (I think)
> 
> Bret
> 
> 
> 
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