re: My AV receiver pulls an IP address from my ISP

so you have this?

LINK

This is not an easy thing to figure out.

Normally if you have an outside IP address that interface would need access to a wan port of some type. The static routes and open ports to a workstation don't really have any impact on this.

Also, since the audio nic interface is set to DHCP and is getting an outside interface address, how is everything else on the same switch getting a 10... You said it was a dumb switch so I assume it doesn't even have an uplink port on it.

just talking out loud.

The IP that is allocated to the AV, can you ping it from out outside?

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This is not an easy thing to figure out.

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Agreed. I've never come across this sort of thing before.

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Normally if you have an outside IP address that interface would need access to a wan port of some type. The static routes and open ports to a workstation don't really have any impact on this.

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Understood- I was simply including everything so that essentially any questions about what was happening on the network or with the cabling were explained before they were asked. I'm aware that patch panels and port numbers are irrelevant, but I figured if I included them in the OP, when reading it, you would be able to say "Oh. Yeah. He does know what goes where and has it hooked up correctly"

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Also, since the audio nic interface is set to DHCP and is getting an outside interface address, how is everything else on the same switch getting a 10..

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That's my question! Well, really, "Somehow this is happening, so I thought I'd share an interesting story. But does this interesting story give me reason to worry about something funny in my network that poses a security threat to the inside?"

I'm not really paranoid enough to think that anything inside my network is all that valuable, but I'm just generally curious because it's something I've never seen or read about before.

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You said it was a dumb switch so I assume it doesn't even have an uplink port on it.

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Correct. The back has a power cable. The front has ports 1-24 double-stacked with no discrete uplink port. In various stages of setup, I've used ports 1 and 24 as the uplink, but there's nothing about the switch that requires that or even allow me to choose (other than, of course, the physical plugging the right wire in any given port)

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The IP that is allocated to the AV, can you ping it from out outside?

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Now that's something I missed. I didn't try this, and it's fixed now- I can turn off/on DHCP and reset the network settings and get it to pull an inside "10.xxx...." address. I'm sure if I don't keep the reservation on my router's DHCP server for its new address, it will eventually fall back to the "outside," but I'm sort of done playing around with that (I hope).
I was able to navigate to the AV's webpage from within the network with the "outside" IP address. I was not able to navigate to it from the outside. I never attempted to ping it from the outside.




Irrelevant to the topic at hand, but here's some of the gear:
Orange jacks are punch down. Blue are female/female couplers. I like the thin patch cables (from Monoprice).

I've still got another ~4 ethernet lines to run. Everything is labeled in a file on my phone. I eventually need to label the panel itself.

And I'm making use of the space I've got- this is a house built in the 90s with a CRT TV cabinet next to a fireplace. I'm assuming that little shelf was previously used for a VCR or cable box. There was a TV mount over the fireplace when I bought the place, so I went ahead and mounted up there (which is pretty much my least favorite way of doing it, but I'm working with what I've got)

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pretty tech savvy for a Doc.

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I worked in IT in undergrad and then as a sysadmin for a year before going to med school. Simple networking is fun for me, for whatever stupid reason.

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you gonna pay for the license ?

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draw . io
Then screenshot when done