Re: Dual WAN set-up

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On Friday 13 January 2012 2:25:45 am Andrew Beverley wrote:
> Thanks for the comprehensive answer Lloyd. A couple of minor 
points:
> > 2. You would set up a custom routing table for the special
> > DMZ traffic. Use the info in the above link to do that. 
> > Suppose it is called "DMZSPECIAL".  You will set up routing
> > to the new DMZ interface using the MYDMZ table, something
> > like this:
> >
> > 	ip route add 10.x.x.x/8 dev ${DMZinterface} src ${wan} table
> > DMZSPECIAL ip route add default via ${gateway} dev
> > ${interface} table DMZSPECIAL
>
> [...]
>
> > 3. You would NEW mark all packets from the special DMZ hosts
> > with fwmark 1, like this (repeat for each source IP or subnet
> > to use the new interface):
>
> Using marks is one way to do this, and provides plenty of
> flexibility. However, if all the traffic is coming from the
> same IP address / interface, then you should be able to use
> straight iproute2 rules to match those aspects, without even
> touching iptables (see ip rule).
>
> > 	iptables -t mangle -A PREROUTING -m state --state NEW
> > -s 10.x.x.x -j CONNMARK1
>
> Also, if you do decide to use netfilter marks (which is
> certainly no bad thing IMHO), then you probably don't need to
> mark connections and then restore them. Instead just mark a
> packet straight away:
>
> iptables -t mangle -A PREROUTING -s 10.x.x.x -j MARK --set-mark
> 1
>
> Andy
>
>
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Thanks to you both.  I'll go over your suggestions, and try to 
implement this asap.  Please stand by as I may need additional 
hand-holding :-)  .

Dimitri

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