Abhinay,
Can you please describe this in more brief?
You've two servers in your network 192.168.1.0/24.
And you want to translate both of them to 1.2.3.4? Am i right in understanding this?
Do you want to access this web-server 192.168.1.2 using its translated ip address 1.2.3.4 from the inside network "192.168.1.0/24"?
If yes,
Then think about this .
1. You initiate a packet from a Client 192.168.1.10 to abc.com.
2. Your Local DNS server resolves it to 1.2.3.4 and provides this ip address to the Client.
3. Now 192.168.1.10 initiates a packet to 1.2.3.4 and sends it to the ASA , as ASA is default gateway of this Client.
4. ASA does routing lookup and has a route for 0.0.0.0 0.0.0.0 pointing on outside, so as per ASA this destination ip address 1.2.3.4 is on the outside interface.
5. After routing lookup ASA finds that this ip address 1.2.3.4 on outside is translated to 192.168.1.2 on inside and should go back to inside network.
6. ASA cannot allow this , as this same packet tries to go from inside to outside and again back to inside.
So we can do hair-pinning in this solution.
static (inside,inside) 1.2.3.4 192.168.1.2 netmask 255.255.255.255
This gives ASA an xlate on the inside interface and if ASA receives a packet on the inside interface for 1.2.3.4 ip address, ASA u-turns that packet (by default not allowed) back to the inside network and sends it to the 192.168.1.2.
Please check this
http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a00807968d1.shtml#solution2
Let me know if you've any further doubts.
Puneet
