Depends. If the zone responsible for whatever resolves to that IP is hosted locally - then DNS request would stay local.
If the service behind that IP is running locally - then all traffic would stay local. Network stack would be smart enough to not run circles to find itself.
Yeah, the router ought to know that public IP belongs to a device in its own network unless you’re doing stuff like running your own router behind an ISP provided router and just forwarding ports instead of maintaining IP assignment / routing tables
Noob question. Would that request travel over the internet or is it resolved locally?
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Depends. If the zone responsible for whatever resolves to that IP is hosted locally - then DNS request would stay local.
If the service behind that IP is running locally - then all traffic would stay local. Network stack would be smart enough to not run circles to find itself.
Yeah, the router ought to know that public IP belongs to a device in its own network unless you’re doing stuff like running your own router behind an ISP provided router and just forwarding ports instead of maintaining IP assignment / routing tables
Tell that to my opnsense box that refuses to NAT mirror.
I think OP is referring to NAT hairpinning though.
That’s a WAN IP, so it would be resolved by external DNS then routed back
Why are you mentioning dns? This is an ip request, no need to contact a dns server
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Yes, that was the train of thought I was on. I equated “find” to “resolve” and I’ve been dutifully chastised.
Yeah no need for DNS but an ARP lookup would be in order.