Source IP : Where traffic from. If you set source IP with 192.168.0.1, traffics from 192.168.0.1 will be controlled.
Dest IP : Where traffic heads to. If you set dest IP with 192.168.0.1, traffics headed to 192.168.0.1 will be controlled.
Source Netmask : Determines range of source IP address. It's according to IPv4 CIDR subnetting rule.
Dest Netmask :Determines range of dest IP address. It's according to IPv4 CIDR subnetting rule.
Up/Down Floor : Floor is speed that you want to guarantee least. For example, if you set Up/Down Floor to 10Mbps, you can guarantee at least 10Mbps speed for upload and download.
Up/Down Ceiling : Ceiling is speed limit. For example, if you set Up/Down Ceiling to 10Mbps, your upload and download speed is limited to 10Mbps, and you cannot use any more than that.
== Example ==
Source IP : 192.168.0.5
Dest IP : 0.0.0.0
Source Netmask : 255.255.255.255
Dest Netmask : 0.0.0.0
Up Floor/Ceiling : Floor 0 Mbps, Ceiling 10Mbps
Down Floor/Ceiling : Floor 0 Mbps, Ceiling 10Mbps