Hello! > Tcpdump output is where I'm seeing the difference in the clients receive > window. This window is inessential at all, there is no data flow in that direction. Please, make normal full tcpdump of problematic session as I asked you. Alexey - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html