172.16.5.0/23 is not a valid subnet

Just a slight annoyance from a network engineer working through HTB Academy’s Penetration Tester path…

Within the courseware, there are many mentions of the 172.16.5.0/23 subnet/network. There is no such thing as a 172.16.5.0/23 subnet - instead, what’s being listed is a valid IP address found within the 172.16.4.0/23 subnet which ranges from 172.16.4.0 - 172.16.5.255.

Because the content here is so outstanding, I thought I’d point out this (glaring to a network engineer) mistake in hopes that someone at HTB corrects it.

If the scope of the attack in a module is ‘any possible target whose IP address begins with 172.16.5’ then either list it as 172.16.5.0/24, or just say ‘any host with an IP address of 172.16.5.x’ - but for the sake of technical correctness, my hope is that references to the invalid 172.16.5.0/23 ‘subnet’ will be removed.