Is there a way to find which device an IPv6 address belongs to? Also, is there standard way to keep track of your devices on the network in pfSense?
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Hi,
I am currently seeing 4 DHCPv6 leases handed out where one of them I have identified as being my iPhone's, but I see 3 other IPv6 address which have no MAC addresses and show as being offline.
Devices currently on my network are the following.
Connected through Ethernet port on Unifi Switch:
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Netagte igb1 port
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Macbook
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Rasberry Pi for unifi controller
-Unifi AP
- Fire TV
Connected to Unifi AP:
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iPhone
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Apple watch
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2 ring cameras
In case it is relevant, the WAN port is connected to the ATT gateway's LAN port for IP Passthrough.
That said, I have not seen any rogue devices in the Unifi controller and DHCPv4 lease on PFsense also check out. So I am unclear which devices those DHCPv6 leases belong to.
TIA
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@code4food23 Many devices will use a Temporary IPv6 Address. Basically, IPv6 can be so unique that it would identify a person/computer, so software can acquire additional/other addresses to communicate. My PC currently has 8 IPv6 and my phone has 3.
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@steveits Thanks for that information. Certainly clarifies a lot. I see my phone "currently" also has three IPv6 address but the other two dont match with what is listed on the DHCPv6 leases nor do I see them on the NDP table.
How could I see the temporary ipv6 addresses for my phone?
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@steveits Correction. I did an ifconfig on my Mac and rasberry pi and determined the other two of the three "offline"' DHCPv6 leases belong to them. So I'm assuming the other one must belong to one of the other devices I have.
Any idea why they would show as being "offline" when they are not and also dont show their mac address? Is there a command I can run that will give me the ipv6 address for all devices on my network, like some sort of network wide ifconfig?
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Get the MAC address and see what it belongs to, just as you would with IPv4.
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"Offline" only means it isn't in the NDP table. That only means it hasn't tried to communicate to or through the firewall using IPv6 in the last few minutes.
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@jimp Well that certainly makes sense. It was puzzling to me and had me thinking I had unknown devices somehow. Is there a way to show the devices with their respective ip v6 and v4 address or a better way to keep track of who is who on my network?
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Not with SLAAC, and that's sort of by design for privacy.
You can disable SLAAC and do only managed DHCPv6 but then some clients will not work with IPv6, like Android.
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@jknott unfortunately when the DHCPv6 lease says offline it seems that the MAC address is not shown
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@jimp I believe I had set it to DHCPv6 only but what is the setting I need to disable SLAAC?
