Caveat emptor: avoid Inseego 5G products unless you still believe in classful routing

In the category of “I can’t believe I still have to worry about this in 2023”
comes an unfortunate discovery I made recently when setting up a network
for a local non-profit. The Inseego FX2000 5G router looked like a nice
product, it supports OpenVPN out of the box, flexible firewall rules, etc.

What I did NOT expect from a device made in 2023, and didn’t think to
ask about ahead of time, is whether it supported classless routing.

Setting the unit up, I discovered the hard way that the developers are
apparently still working from 1989 textbooks. The only netmask the
router will accept for a 10.x.x.x. subnet is Absolutely refuses
to accept a different length netmask.

Even the user manual reflects the inherent classful assumption:

IP Address: The IP address for your FX2000, as seen from the local network. Normally, you can use the default value.
Subnet Mask: The subnet mask network setting for the FX2000. The default value is standard for small (class “C”) networks. If you change the LAN IP Address, make sure to use the correct Subnet mask for the IP address range of the LAN IP address


So, before anyone else makes the same mistake I did, I thought I’d give the
community a heads-up to avoid the Inseego line of 5G products, as they’re
woefully behind the times in their understanding of IPv4 subnetting as it
exists in 2023. ^_^;



Matt Harris​


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v6 support is good, actually! I am using it to good effect.

The classful part is very surprising. This site doesn’t use a lot of v4 so I hadn’t given that much thought.

If they think classful IPv4 is the state of the art, I would not assume they have heard of IPv6.

Sent using a machine that autocorrects in interesting ways…