Intrusion Detection - whitelist network?

I’m using the intrustion detection in FreePBX - Admin - System Admin - Intrusion Detection and put in for a network address in the whitelist but PC got banned. Do we have to put in to indicate the network mask? Will it accept networks? When manually configuring Fail2ban, you could indicate network addresses to whitelist.

Yes, it needs the netmask so in your case (assuming a Class-C Network) it would be