Source and Destination is same through ASA Firewall

Posted on 2014-02-17
Last Modified: 2014-03-07

My Server is at Inside Network.
My Laptop is at Inside Network

My server Public ip registered outside (internet DNS). and there is no internal DNS

When i am trying with  URL,which has registered in Public DNS , the request is going via ASA Firewall and hits to the DNS server and DNS server redirects to the Firewall and Firewall do the reverse-NAT and changes public to Private but my Laptop not able to access the server over URl

I have studied that Firewall will not send to the destination that has passed over the same  interface..

What would be the solution , Can it be cone over DNS-doctoring ?

Question by:RAMU CH
  • 2
LVL 19

Expert Comment

by:Miguel Angel Perez Muñoz
ID: 39864614
You can try adding an entry on host file to do resolution with internal IP.

Author Comment

ID: 39864702
We cannot do 1000 PCs  hence it should happen over Firewall..

Is there any configuration in ASA firewall

Accepted Solution

Jordan Medlen earned 500 total points
ID: 39864778
Try adding a static route for the IP address of the URL you are trying to hit, and point it to your gateway IP address of the firewall.


route outside <ip_of_url> <firewall_ext_gw_ip> 1

This is a dirty trick to accomplish connectivity. Your firewall will now direct that traffic to it's gateway and the gateway device will send it right back around to the outside interface, and provided ACLs are in order, allow that traffic to pass back in.

Author Closing Comment

ID: 39912244

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