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Integration of overlapping networks

komma.vanaja
Level 1
Level 1

Hi,

i have a requirement of integrating two overlapping networks using ASA.

i have exp on switches and routers but not on security devices liks asa firewall.

one network has 172.16.0.0/24 address and other has 172.16.0.0/16 address range

As per my knowledge we can't assign these subnets to interfaces of asa as they may overlap. So i planned to use a router in between asa and 172.16.0.0/24 network. i configured nat in router and comming to asa i reffered few documents and configured it. but the problem is with traffic flow between asa interfaces. one interface is configured in 172.16.0.0/16 network (inside) and other interface in 192.168.100.100/24 network which connects  router (outside 172.16.0.0/24). i am either unable to ping inside interface from outside nor  outside from inside. By default inside must be able to access outside network right? but its not happening. From few documents i came to know that we need to allow icmp traffic. i did that with acl but still no go. Pls help me.  

Thanku.

15 Replies 15

Could you pls post sample configuration.

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