[K12OSN] Help with iptables

James P. Kinney III jkinney at localnetsolutions.com
Fri Dec 12 01:14:37 UTC 2008


Crud. Wrong chain and wrong target definition. see below
On Thu, 2008-12-11 at 19:19 -0500, James P. Kinney III wrote:
> On Thu, 2008-12-11 at 08:55 +0000, Brian Chivers wrote:
> 
> > I'll try and draw a ASCII diagram, try being the word :-)
> > 
> > Thinclients 10.0.0.x
> >          |
> >          |
> >       Server 10.0.0.1
> >              192.168.0.100
> >          |
> >          |
> >       MAIN NETWORK (All servers on 192.168.0.x/16 - Proxy 192.168.0.80:8080
> >          |
> >          |
> >       Firewall (Green Network - 192.168.0.2)
> > 	      (Orange DMZ - 172.16.0.x)
> > 	      (Red - 212.219.x.x)
> >          |
> >          |
> >        CISCO to Internet
> > 
> > What I don't want to is the thinclients to be able to access the internet WITHOUT the proxy but I'd 
> > like them to be able to access the DMZ machines without using the proxy.
> > 
> Ah! Now I see what you are doing!
> On the thin client server you need ALL web traffic NOT going to the DMZ
> machine to go through the proxy
> 

CORRECTED
> iptables -A -t nat PREROUTING -d ! 172.16.0.0/255.255.255.0 -p tcp -m
> tcp --dports 80,443 -j DNAT --to-destination 192.168.0.80:8080
> 
> 
> 
> -- 
> James P. Kinney III          
> CEO & Director of Engineering 
> Local Net Solutions,LLC                           
> http://www.localnetsolutions.com
> 
> GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
> <jkinney at localnetsolutions.com>
> Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
> 
> 
-- 
James P. Kinney III          
CEO & Director of Engineering 
Local Net Solutions,LLC                           
http://www.localnetsolutions.com

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7


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