Hello Eng. walid,
I have a question regarding configuring command line
ip nat pool aa 10.0.0.1 10.0.0.4 netmask 255.255.255.0
the net mash here in that command supposed to be netmask for ips in the pool which is 255.0.0.0 or it is the subnet mask for the source network 192.168.1.0 ?
Also when you configured the dynamic nat for the pool from ip 10.0.0.1 to 10.0.0.4 and you already have an ip 10.0.0.2 as an ip for the interface in the next router, does that can create any conflict if one computer in the private network got assigned a public ip 10.0.0.2 when trying to connect to the internet?

thanks and best regards
Ahmed Hakam