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 <Local IP Addr>

Starting Nmap 7.93 ( https://nmap.org ) at 2024-10-04 11:44 BST

Failed to resolve “1-9999”. Nmap scan report for <Local IP Address> 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.

UPDATE 10/6

I am working through all these suggestions. I am sorry for the slow responses, but I have my hands full with family weekend. I will post more next tomorrow. But I did do one thing that has me scratching my head and wondering if this may be a wild goose chase.

I ran the nmap again per below with a completely fictional IP address within my normal range. It gave the exact same results:

nmap -A -T4 -p- -Pn <Fictional IP>

Starting Nmap 7.93 ( https://nmap.org ) at 2024-10-05 13:36 BST Nmap scan report for <Fictional IP>

Host is up (0.054s latency).

All 65535 scanned ports on <Fictional IP> are in ignored states.

Not shown: 65525 filtered tcp ports (no-response), 10 filtered tcp ports (host-unreach)

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .

Nmap done: 1 IP address (1 host up) scanned in 182.18 seconds

  • Agent641@lemmy.world
    19·
    2 months ago

    In addition, you might like to do a portscan on that IP address to see if any other ports reaveal something more interesting.

    You can run this in cmd prompt, I think, if nmap is available on your windows machine:

    nmap -p 1-9999 192.168.1.1

    IIS can only run on a windows OS, so it must be a windows physical machine or VM connected to your network.

    • RestrictedAccount@lemmy.worldOP
      5·
      2 months ago

      Thanks as you can tell, I’m not an expert in any of this.

      I will run this as you described.

      I did the nmap based on input from ChatGPT, it had me do a Ping base scan with nmap. It turned up nothing because that IP address did not return a Ping.

      This has me really curious.

      I’m concerned that the website I opened in Safari on my phone is bringing up a cache on my browser and is not actually live.

      I tried to open it from an iPad and it did not load. Iit still loads off my phone even though I have rebooted everything.

      • biscat@lemmy.world
        4·
        2 months ago

        In case it helps your troubleshooting, ICMP (ping) is typically disabled by default on Windows.

          • 0xD@infosec.pub
            2·
            1 month ago

            Your command needs to look something like this:

            nmap -Pn -sVC -p- (IP) -o scan

            -Pn skips the availability check per ping

            -sVC performs a version and a script scan so you get more information

            -p- scans ALL ports

            -o puts out a file called scan.nmap

            If you want you can share that output afterwards for further info.

            Edit: You can also try enumerating the directories on the server if you find no content. I can help you with that if you want.