When I use Advanced IP Scanner from any workstation on the LAN, we're seeing some devices populated with hostnames in the format of 'X-X-X-X-static.midco.net', where the 'X-X-X-X' represents the IP address of the device. The devices that are populated are indeed all devices that are actually on the LAN, the IP that they're getting matches the MAC address that's listed in the IP scan, it's just the hostname that's completely inaccurate. Screenshot of scan results: https://ibb.co/mrwgod
Midco is their ISP and when I conduct a traceroute to their public IP I see that the last few hops are all represented by that same format of hostname, the 'X-X-X-X-static.midco.net', however the IP address represented by the 'X-X-X-X' in this case is much more similar to their public IP address scheme whereas the entries shown in the Advanced IP Scanner are all reflecting their LAN scheme.
My first thought was that somehow there had to be a link between their LAN and WAN that wasn't being blocked by the firewall, and somehow Midco's core/distribution devices were accepting DHCP from their LAN. However that doesn't add up when I consider that IP addresses listed with those wild hostnames are actually connected on their LAN and even the MAC addresses listed for them are accurate to those devices.
Weirdest thing I've ever seen. They're chomping at the bit for an answer, please help!
Midco is their ISP and when I conduct a traceroute to their public IP I see that the last few hops are all represented by that same format of hostname, the 'X-X-X-X-static.midco.net', however the IP address represented by the 'X-X-X-X' in this case is much more similar to their public IP address scheme whereas the entries shown in the Advanced IP Scanner are all reflecting their LAN scheme.
My first thought was that somehow there had to be a link between their LAN and WAN that wasn't being blocked by the firewall, and somehow Midco's core/distribution devices were accepting DHCP from their LAN. However that doesn't add up when I consider that IP addresses listed with those wild hostnames are actually connected on their LAN and even the MAC addresses listed for them are accurate to those devices.
Weirdest thing I've ever seen. They're chomping at the bit for an answer, please help!
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