SNAT Delay

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Hi,

I m using a simple NAT scenario. My Linux router has 2 interfaces connected to 2 machines, M1 and M2.

        M1                      Linux NAT Router                    M2
[192.168.1.2]<----->[192.168.1.1][10.0.0.1]<----->[10.0.0.2]

Forwarding is enabled on the router. All the tables in iptables are flushed. I have enabled continuous ping from M1 to M2. I get no response.

I execute the following iptables command:-

iptables -t nat -A POSTROUTING -o eth0 -s 192.168.1.2 -j SNAT --to-source 10.0.0.1

I am still unable to receive any instant ping response. The NAT translations start happening after an unacceptable interval of time after which I am able to receive response.

Is this normal? Is there a workaround so that NAT translations begin instantly as and when a rule has been inserted?

Vikram



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