I know that I can use the "Interface" filter, however, the name of this Interface has a space and it seems that PRTG don't accept fields with spaces. This interface is the gateway of one of my network and I just want to monitor the traffic usage of IPs and what types of traffic consumes the bandwidth of this network. I am thinking of filtering all the IPs, meaning listing all the IP one-by-one, but there are a lot of IPs that I have to enter. May I also know if I can filter an IP using IP and subnet format? Or perhaps, can you give me any workaround to achieve this setup?