nmap's seeing the 1-9999 as the next argument (expecting an IP address). In -Pn, the n is a placeholder for the port numbers you want to scan, so you want -P1-9999
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Besides the MAC lookup suggestion, have you tried to simply find hostname in local DNS by reverse IP lookup, maybe that would shed some light.
Not sure if there is anything useful, but in browser just check site source, maybe there is something useful there that could help with identification. Does site have certificate? It might include info that would help with identification. Do the standard browser network trace via dev tools F12, maybe something useful appears there.
In nmap you can attempt to guess OS, try that. Additionally it might be possible to get hostname as well.
And have you checked your router to see if this connection is connected to your Wi-Fi AP or Ethernet to narrow things down? If it is not possible to determine this from router, simply connect your main PC to Ethernet, disable AP in router settings and check if IIS site is still up. If it is not, enable AP again, does it come back early or it takes some time?
Lastly, if it still is a mystery, start powering off devices one by one to find the source. Based on comments it seems you have multiple devices, but I assume it would not take that long?
You don't have Ethernet over power do you?
Fun story, I live in a townhome, I had so bizarre network issues going on. Not able to stream to TV etc. finally started unplugging shit. Unplugged the router and saw the computer still happily downloading something WTF! Turns out a neighbor also had Ethernet over power and devices were randomly connecting to their network. Crazy ass shit.
I'm confused. Are you talking about power over ethernet or power-line ethernet?
There are Ethernet extenders that can utilize the power lines. They basically plug into an outlet and you stick an Ethernet into them and do the same somewhere else in the house.
Exactly, except mine was talking to the neighbors :p
It's me. I'm your nextdoor neighbour. Sorry!
Maybe set up Kismet https://www.kismetwireless.net/
That'll show devices attempting to break in wirelessly
... So when you port scanned it, IIS was gone?
Bro, you gotta keep us updated, I'm surprisingly invested in this now.
I lost my entire morning to this yesterday. I had to work late to catch up. There are some good ideas in here I’m starting on now.
Windows IIS probably from around the time of windows 8 so maybe 2012. Probably running on either windows server 2012 (like exchange, an active directory domain controller, or if you are unlucky sharepoint) or some weirdly configured appliance running windows 8 ish enterprise.
Thanks. This helps. My work computer is way newer than that. It makes me think it could be networking hardware. I have some kit that’s about that old.
Maybe try traceroutre or lft (layer 4 traceroutre) to see if something wacky is happening with routing in your lan?
You're looking at my worst nightmare 😅
I would download metasploit and dig up some interesting exploits to try against it.
Following, I want to know what god awful iot device this is. Refrigerator? Toaster oven? Vibrating dildo? The suspense is killing me
Nobody wants windows on a vibrating dildo
Maybe I want my vibrating dildo to take an hour to load and come with spyware
I have a Bluetooth controlled vibrator. Reverse engineered the app (which has a chat function) and it has a blacklist of words (mainly Chinese) you're not allowed to text using the app.
I did not check if your horny chat gets copied to Chinese spy agencies, but I suspect that will be done on the server.
load and come
I mean, Windows already fucks us metaphorically
It's the default page for a Windows Server running IIS web server.
Others haven't suggested this yet, but a single device, like your laptop, even with one connection, can have two IPs.
Thanks. It is neither the Ethernet nor the Wi-Fi on my windows laptop.,
Don't just turn your devices off when testing - - unplug them. An off computer can still respond to network requests.
I did not think of this. I will have to go into the bios to turn off the battery of my work laptop.
There's Power Over Ethernet too.
Get the MAC address from the ARP table, and look up the OIN, should help you determine if it's virtual or physical, and if physical the type of NIC it's using.
So, as others have saId this is just an unconfigured IIS server, which implies it's either a windows machine, or a windows based VM, well or someone put the default IIS files on another server, but that's unlikely.
When you say "weird" IP I'd wonder what you mean by that.
I think since it's probably a windows machine, from another windows machine typing nbtstat -A <ip> should give you the computer name and workgroup or domain they belong to. See if it matches anything you expect on your network.
If not, maybe it's time to change your WPA wifi key.