I am using a Shorewall linux box to manage my 6 incoming static ip's and to provide NAT translation for my workstations out to the net. With the NAT on, I am losing about 100K of upload speed. I usually get 440-450 Kbps but i am getting 340 Kbps thru NAT.
Does this sound normal? I can understand some latency in translating addresses going out, but this seems excessive to me.
FYI: I have Oplink DSL, the plan is 3Mbps down and 512Kbps up. I get really good speeds because my office is 800 ft. from the junction box.