Hi,
no this is not possible by IP( because hairpinning is not supported on Cisco routers) but it is via FQDN by taking advantage of the DNS doctoring feature( in this case you'll need to have a A record on an external DNS server and the router will change the IP address returned by the server to the inside IP when accessing from inside).
You can also do this using an internal DNS server as it has already been discussed on this forum.
Regards.
Alain
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