Centos 5.x again... Is there a way to limit port access on a per-user basis? My practical goal is to limit, who is allowed to use SMTP AUTH in Sendmail. Any possible solutions appreciated... Obviously, limiting by ip will not work, since the very purpose of SMTP AUTH is to enable mail relaying for trusted users from *anywhere*. - Jussi -- Jussi Hirvi * Green Spot Topeliuksenkatu 15 C * 00250 Helsinki * Finland Tel. & fax +358 9 493 981 * Mobile +358 40 771 2098 (only sms) jussi.hirvi at greenspot.fi * http://www.greenspot.fi