"Loopback" or "reverse NAT" on EA2700 / DB N600

I'm having some trouble finding the right setting on the included tools - I'm familiar with how to do it in ddwrt but don't want to change from stock on this one.
What I have is that I want to be able to access certain ports via my public IP address (Instead of local network address) from within my house.  For example, internal address is 192.168.1.125 to point to a given device, and I have it mapped out on the public IP address - (fake IP) 129.252.67.60:8080 to point to that device.  I can access that public IP address fine from outside of my home network, but if I try to do so while connected to my home network, it will not connect.  (Of course, I can connect to 192.168.1.125 fine from my home network.)
From what I recall and have read, I need to turn on "loopback" or "reverse NAT" somehow to let the router know to point the external IP address request right back...
If anyone has any advice/fixes, I would greatly appreciate it - I have settings on my computer/tablet that I would prefer to not have to keep two separate versions of (One for external networks, one for internal networks) if it can be avoided.
Thanks in advance,
-l

Ensure the box "Filter Internet NAT redirection" IS CHECKED on the security tab. Selecting the checkbox and saving worked for me to get Loopback within my network

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