3. R2 replaces the inside global address of 209.165.201.5 with the inside local address of 192.168.10.254. R2 then forwards the packet towards the web server.
4. The web server receives the packet and responds to the client using the inside local address, 192.168.10.254.
5a. R2 receives the packet from the web server on its NAT inside interface with source address of the inside local address of the web server, 192.168.10.254.
5b. R2 checks the NAT table for a translation for the inside local address. The address is found in the NAT table. R2 translates the source address to the inside global address of 209.165.201.5 and forwards the packet out of its serial 0/1/0 interface toward the client.
6. The client receives the packet and continues the conversation. The NAT router performs Steps 2 to 5b for each packet. (Step 6 is not shown in the figure.)