NAT and IPSEC

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Hello,

I have to separate ipsec tunnels going to two different private networks. How do I keep iptables from natting the traffic destined for these 2 networks. I tried:

iptables -t nat -A POSTROUTING -o eth1 -d ! 192.168.1.0/24 -d ! 172.16.0.0/16 -j MASQUERADE

but it says only one -d is allowed. So I tried
iptables -t nat -A POSTROUTING -o eth1 -d ! ( 192.168.1.0/24 || 172.16.0.0/16 ) -j MASQUERADE

and it says "(" error. So how do I specify multiple destination networks/addresses to be excluded from being natted.

Thanks,
Steve

--

"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty
decreases."  (Thomas Jefferson)


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