this post was submitted on 03 Oct 2024
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UPDATE 10/4 6:47 EDT

I have been going through all the comments. THANKS!!!!!! I did not know about the techniques listed, so they are extremely helpful. Sorry for the slow update. As I mentioned below, I got behind with this yesterday so work cut into my evening.

I ran a port scan. The first syntax, -p, brought no joy. The nmap software itself suggested changing to -Pn. That brought an interesting response:

nmap -Pn 1-9999

Starting Nmap 7.93 ( https://nmap.org ) at 2024-10-04 11:44 BST Failed to resolve "1-9999". Nmap scan report for Host is up (0.070s latency). All 1000 scanned ports on 192.168.0.46 are in ignored states. Not shown: 990 filtered tcp ports (no-response), 10 filtered tcp ports (host-unreach)

Nmap done: 1 IP address (1 host up) scanned in 6.03 seconds

Just to be absolutely sure, I turned off my work computer (the only windows box on my network) and reran the same syntax with the same results.

As I read this, there is definitely something on my network running windows that is not showing up on the DHCP.

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[–] f4f4f4f4f4f4f4f4@sopuli.xyz 1 points 9 hours ago

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

[–] OfficerBribe@lemm.ee 1 points 12 hours ago* (last edited 12 hours ago)

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?

[–] Crashumbc@lemmy.world 8 points 1 day ago* (last edited 1 day ago) (1 children)

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.

[–] iguanajuice@lemmy.world 4 points 1 day ago (1 children)

I'm confused. Are you talking about power over ethernet or power-line ethernet?

[–] JordanZ@lemmy.world 9 points 23 hours ago (1 children)

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.

[–] Crashumbc@lemmy.world 3 points 23 hours ago

Exactly, except mine was talking to the neighbors :p

[–] Flax_vert@feddit.uk 13 points 1 day ago

It's me. I'm your nextdoor neighbour. Sorry!

[–] mvirts@lemmy.world 2 points 23 hours ago* (last edited 23 hours ago)

Maybe set up Kismet https://www.kismetwireless.net/

That'll show devices attempting to break in wirelessly

[–] mvirts@lemmy.world 2 points 23 hours ago

... So when you port scanned it, IIS was gone?

[–] Agent641@lemmy.world 40 points 1 day ago (1 children)

Bro, you gotta keep us updated, I'm surprisingly invested in this now.

[–] RestrictedAccount@lemmy.world 21 points 1 day ago

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.

[–] carpelbridgesyndrome@sh.itjust.works 25 points 1 day ago (1 children)

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.

[–] RestrictedAccount@lemmy.world 13 points 1 day ago

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.

[–] mvirts@lemmy.world 1 points 23 hours ago

Maybe try traceroutre or lft (layer 4 traceroutre) to see if something wacky is happening with routing in your lan?

[–] mvirts@lemmy.world 1 points 23 hours ago

You're looking at my worst nightmare 😅

I would download metasploit and dig up some interesting exploits to try against it.

[–] Seasm0ke@lemmy.world 62 points 2 days ago (1 children)

Following, I want to know what god awful iot device this is. Refrigerator? Toaster oven? Vibrating dildo? The suspense is killing me

[–] spearz@lemmy.world 34 points 2 days ago (2 children)

Nobody wants windows on a vibrating dildo

[–] WrenHavoc@lemmy.dbzer0.com 16 points 1 day ago (4 children)

Maybe I want my vibrating dildo to take an hour to load and come with spyware

[–] froh42@lemmy.world 3 points 15 hours ago* (last edited 15 hours ago)

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.

[–] caseyweederman@lemmy.ca 5 points 1 day ago

load and come

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[–] Seasm0ke@lemmy.world 26 points 2 days ago

I mean, Windows already fucks us metaphorically

[–] ptz@dubvee.org 182 points 2 days ago

It's the default page for a Windows Server running IIS web server.

[–] fmstrat@lemmy.nowsci.com 20 points 1 day ago (1 children)

Others haven't suggested this yet, but a single device, like your laptop, even with one connection, can have two IPs.

[–] RestrictedAccount@lemmy.world 7 points 1 day ago (1 children)

Thanks. It is neither the Ethernet nor the Wi-Fi on my windows laptop.,

[–] caseyweederman@lemmy.ca 9 points 1 day ago (1 children)

Don't just turn your devices off when testing - - unplug them. An off computer can still respond to network requests.

[–] RestrictedAccount@lemmy.world 6 points 1 day ago (1 children)

I did not think of this. I will have to go into the bios to turn off the battery of my work laptop.

[–] caseyweederman@lemmy.ca 7 points 1 day ago

There's Power Over Ethernet too.

[–] SlothMama@lemmy.world 14 points 1 day ago (5 children)

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.

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[–] r00ty@kbin.life 73 points 2 days ago* (last edited 2 days ago) (5 children)

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.

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