I had a serious problem of slow data transfer from server to local computer (the network utilization is only 6%). I happened to find that the mysterious slow network problems are caused by Blackice firewall ran on the server. With the firewall on the read transfer rate from server is slow (network utilization is only 6%), with it switched off it is fast (80%). The write transfer rate always fast ( about 80%) and does not seem to be affected by the firewall. Does anyone has suggestion to help solve this problem. Many thanks!