On Thu, 2011-09-08 at 22:16 +0100, Simon Hobson wrote:
> Ryan Ferguson wrote:
> >I'm trying to setup cidr routing on shorewall and don't understand 
> >the proper way to do this.  We changed isp's to cox.net and now they 
> >have given us a public ip and a public cidr block of ip's on a 
> >separate subnet than our public ip is on.  How do I set this up 
> >proper in the config files?
> 
> Lucky you - that allocation of IPs gives you so much flexibility.
> 
> Traditionally you'd use three interfaces - one outside, one 'dmz', 
> one inside. Your outside interface will obviously have to match teh 
> single public IP etc. Then you use the additional IP block on the 
> dmz, and private (RFC1918) addresses on the internal LAN. It's great 
> for servers because they can be on public IPs (ie no NAT) but still 
> have a firewall between them and the outside world.
> 
> With that setup, you define your three interfaces, NAT your inside 
> interface to the outside (using the shared public IP), and set your 
> policies and rules.
> 

I agree with Simon. The configuration that he recommends is so much
cleaner than what you currently have; and it will work.

-Tom
-- 
Tom Eastep        \ When I die, I want to go like my Grandfather who
Shoreline,         \ died peacefully in his sleep. Not screaming like
Washington, USA     \ all of the passengers in his car
http://shorewall.net \________________________________________________

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