Hi all, I would like to know what people here are using for firewall. I read some user reviews in cnet.com and amazon.com and here's what I read: Norton Personal Firewall 2001 3.0 does not work well with Windows 2000. Zone Alarm is rumored to be actually a spyware. :eek: Black Ice Defender seems to have decent reviews (3.5 stars out of 5). Tiny Personal Firewall is more configurable than Zone Alarm but requires some firewall knowledge from the user. I use Pentium 1.3 MHz with 256 MB RAM, Windows 2000 Professional, IB TWS and QCharts. By the way, I read from QCharts site that you may have to configure the firewall to allow QCharts run behind firewall? Thanks for any info, and good trading.