Client/Testing Method

The slowness may not be from any cause on the firewall. It could be the client itself or how it connects. Testing a 100Mbit/s WAN over 802.11g wireless, for example, would never show full speed. Testing a 300Mbit/s WAN from a 100Mbit/s LAN connection would likewise not be a valid test.

Ensure the client is connected to the firewall through a connection at least as fast as the WAN supports.