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ASA 5505 hairpinning

Posted on 2009-04-09
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Last Modified: 2012-05-06
Hi,

I previously had the following network arrangement (IP addresses changed to RFC 1918 for privacy purposes).

An outside network of 192.168.1.0/24 (This is actually public-space in the actual rea-life scenario)
An inside network of  10.0.0.0/24 (This is RFC 1918 space in the real life-scenario)
An Asa 5505 sitting between the two.


A monitoring device with ip 192.168.1.10 monitoring an inside device with IP 10.0.0.10 with SNMP via a static one to one NAT and appropriate ACLs on the ASA.


The configuration has recently changed in that there is now a site to site VPN from the ASA to a remote site (supplied via a DSL line) with an IP range of 10.0.1.0/24. The site to site VPN matches 10.0.0.0/24 to 10.0.1.0/24 and vice versa.
The device with the original IP of 10.0.0.10 has moved to the remote site and now has a IP of 10.0.1.10.
This device is reachable from the 10.0.0.0/24 network directly over the VPN.

What i need to get working is the monitoring. Monitoring traffic will still be sourced at 192.168.1.10 but cannot be allowed to access the target device (10.0.1.0) via the DSL's WAN connection and as  a result the traffic needs to go over the exisitng site to site.
A static one to one NAT is still requried as the 192.168.1.10 machine is actually public IP in real life.
IS this possible?

Cheers,
Phil.
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Question by:PhilMacavity
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Nothing_Changed earned 250 total points
ID: 24115382
Yes, this should work on your ASA by adding this command:

same-security-traffic permit intra-interface
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by:PhilMacavity
ID: 31568460
Additional NAT commands were requried n order to get the correct functionality.
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