> Are you sure you don't have a window scaling corrupting firewall? > Does the problem go away if you turn off window scaling? Well, I am not sure about that, but firewall is zywall 70 on bridged mode. Looks like that kind of issue since all linux machines behind that firewall does not work fine. Looks like firewall failure. echo 0 > /proc/sys/net/ipv4/tcp_window_scaling does not fix the problem, but this problem is also in other machine with different network card, so it is not card driver. what other settings I need to set to /proc/sys/net ? -- Eero - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html