The firewall doesn't do anything to the DSL side of the modem. It can slow
down the data transfer between the modem and the P/C.
It's usually a matter of finding out what firewall setting(s) are related to
the slowdown.

"Richard Fangnail" wrote in message
...
I just got a new Vista computer and I found that my DSL speed was
abnormally slow. I called the ISP and they said to turn off the
firewall. This fixed it.

I wasn't aware a firewall could affect your modem speed so much. The
XP firewall had never done that.