What IPs does the DoD actually host defense-related services on?

E.g. https://www.defense.gov/Resources/Military-Departments/A-Z-L...

I know of a couple companies that used 1.0.0.0/8 as their internal VPN/WAN network. Myself and others explained why this could be problematic but we were ignored. It's actually mostly fine as long as you 1) never need to reach that network and 2) block traffic in that network from leaving your edge network and 3) triple-check that you have blocked that network from ever being announced from your routers. Downside being you have to double or triple NAT to reach anything in that network. Hamachi uses or used 25/8 ministry of defense as their VPN network.

Juniper and Cisco are equipment vendors, not ISPs. If the DOD /8s are used in some documentation examples, that's a whole other thing.

If network operators are taking the theoretical network blocks provided in training examples and attempting to copy and paste them into real world use, that is a whole other problem with training and education. And lack of oversight by senior people who should know better at their company.

1/8 is also a whole other thing because it's a legitimately announced block controlled by, as I recall, APNIC. If it's in some peoples' 20 year old bogon folded that's their problem, not apnic's.