On 06/09/2012 13:57, Meetoo Ashvin wrote:
> Hello,
>
> I am migrating my firewall to a new Debian server. I used to configure
> my adsl interfaces with the norfc1918 flag but it has been removed in
> the newer versions. I've read in the archives that the successor to
> 'norfc1918' is changing the global NULL_ROUTE_RFC1918 to Yes in
> shorewall.conf.
>
> This is a problem for me because I don't want this to apply to all my
> interfaces. I have specific routes defined through other internal
> interfaces and when I activate NULL_ROUTE_RFC1918=Yes in shorewall.conf
> it overrides my routes and I can no longer access them.
>
> Is there a workaround?
>
> Thanks.
>


Hi,

If you have routes that are more specific than:
10.0.0.0/8
172.16.0.0/12
192.168.0.0/16

it shouldn't matter.

Eg:
192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.1
unreachable 192.168.0.0/16


Net: 192.168.0.0/24 remains reachable because it is more specific than 
192.168/16

Laurent

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