Problem with fine-grained CIDR notation (USG Flex 40)

flurvere

The security policies seems to have a problem understanding CIDR notations from /27 and up (or is it down?).

The case in hand is a number of servers in the 192.168.17.96 - 192.168.17.103 range, i.e. 192.168.17.96/29.
But that doesn't work. Neither does 192.168.17.96/28, nor 192.168.17.96/27.

I have to go all the way to /26 (192.168.17.64/26) to get things working properly, or the old-fashioned span 192.168.17.96-192.168.17.103, if I want to keep it a bit tighter.

Zyxel_Melen

Hi @flurvere

192.168.17.96/29 or /28 or /27, the 192.168.17.96 will not in the usable IP range.

If the CIDR is /26, .96 is in the usable ip range.

You can try to create the range address object for this range.