Unable to add CIDR to Firewall Rule

Hi. Trying to add CIDR 185.98.81.1/28 with dashboard UI to Firewall Rules and get this error:

Filter parsing error (1:13):
(ip.src in {185.98.81.1/28})
^^^^^^^^^^^ host part of address was not zero

I checked 185.98.81.1/28 is valid CIDR address for subnet 185.98.81.0 – 185.98.81.15

Any ideas why it doesn’t allow this CIDR to be added?

Try adding 185.98.81.0/28. It seems Cloudflare wouldnt like CIDR addresses which start in the middle of the range, but expects the start address.

Changed CIDR to 185.98.81.0/28 and issue gone!

Thanx, @sandro. My provider sent me original CIDR starting in the middle of the range, I will let them know not to do this.