Home-Router: Access internal server using external ip [migrated]

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http://serverfault.com – If I've got a typical home router -- say a Net Gear -- which has certain ports forwarded to a internal server, is there a way to tweak the router to let me access that internal server using the external IP address from within the same network? Is there a non-enterprise grade router that can handle this type of thing? In case that was strangely worded, let me re-phrase with an example. My external IP is My internal server is Port 1178 is being forwarded from the router to I'd like to be able to be able to hit from an internal ip of by usi (HowTos)