I just switched from a T1 to Comcast HighSpeed Internet 16mb/6mb. I am using a Cisco PIX 515E as our firewall. With the firewall in the works between my laptop and Comcast I get at best 5mb/5mb speeds using Speakeasy speed testing. When I remove the PIX from the equation I consistently get 10mb/5mb. I lose on average between 3-5mb when I put the PIX in the middle. It does not make any sense. I consider configuring the hardware properties of the Outside NIC as far as Duplex and Speed and that didn't make a difference.
I know this is not a bandwidth limitation of the PIX so it has to either be a setting on the PIX or something in the interaction between the Comcast router and the PIX.
Pease help!