Hi to All! I block all traffic not realy needed by ipchains. When fetching email from my isp I logged attempts by the isp-mailserver with tcp to port 113. Can you tell me where to find information about port 113 usage? (/etc/services I checked, but doesnt give me background information) Should or shouldn't I block port 113 ? Best regards Michael Steiner -- Michael Steiner, Minorgasse 35, A-1140 Vienna, Austria