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We have a NAT rule in our ASA 5525-X here, which basically makes it so that 1.2.3.4 on the outside and 10.1.9.10 on the inside are essentially NAT'd. That is, you can reach 1.2.3.4 on the outside, and get served the data at 10.1.9.10.

This is all fine and dandy, but we can't access 10.1.9.10 internally now; I'm not entirely sure how to fix this so we can access it both internally and externally.

Anyone got any pointers?


We're working with ASA version 9.1(7), running on an ASA 5525-X. The ASA is in Routed mode.

Thomas Ward
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  • Use real IPs. ;) But what version of ASA and what platform is this? The answer will be different depending on that. – ewwhite May 30 '17 at 18:28
  • @ewwhite fun fact: 10.1.9.10 is the actual internal address lol. I am forced to obfuscate the actual public IP in this case, by policy. Getting you the information you need shortly, the systems are slow :P – Thomas Ward May 30 '17 at 18:42
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    Question really belongs on http://networkengineering.stackexchange.com IMO. – TheCleaner May 30 '17 at 18:50
  • @TheCleaner It seems to me this would remain on topic here, but *also* be on topic at Network Engineering - this would fit into this part of the Server Fault help center's "what's on topic" here: "managing the hardware or software of servers, workstations, storage or networks" – Thomas Ward May 30 '17 at 18:53
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    This is on topic. I had to solve this at one of my locations yesterday. – ewwhite May 30 '17 at 20:17
  • @ewwhite interesting! I can't wait to hear from you as to how you solved it heh. – Thomas Ward May 30 '17 at 20:35
  • Please provide the requested information ;) – ewwhite May 30 '17 at 21:27
  • @ewwhite I've stated the ASA and model - which do you mean by "platform"? – Thomas Ward May 30 '17 at 21:34
  • I don't disagree that it is on topic for both sites, but I think our "what's on topic" here on SF should be updated to remove networking in 2017 and push folks to the site dedicated to it now. But yes, at the moment it is on topic and Ed can hook you up with a fix it would seem. – TheCleaner May 31 '17 at 13:12

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