If I have 2 routers A and B. Behind router A PC1 is NAT'd to 22.214.171.124 when transmitting to router B. On router B the same PC gets NAT'd to 126.96.36.199 towards router A.
When PC1 transmits to a PC behind Router B does the return traffic have 188.8.131.52 in the headers or 184.108.40.206.
I don't believe it does 220.127.116.11. To verify I would like to be able to capture the traffic coming into the router without a sniffer. I used to have a set of commands that would enable the router to capture traffic coming into the router and the interface it would go out. Similiar to the capture command on a PIX. Is anyone familiar with this command. For some reason netflow comes to mind.
In this case we have static NAT on both routers so the router A sends request to 18.104.22.168 with source address 22.214.171.124 and router B sends response to 126.96.36.199 from PC behind router B with source address 188.8.131.52
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
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