>i wonder iptables can help me set my Computer B to forward packets to >computer A. >is that possible? That's not iptable's job. You need a router. Read the documenation for the "ip" command on your Linux system. All you need is a simple route on computer B that forwards to C...and, of course, routes for traffic from C back to A, etc., and to set the appropriate "ip_forward" value to 1. --Carol Anne Carol Anne Ogdin http://www.net-working.com 530/295-3657 Deep Woods Technology, Inc. http://www.deepwoods.com CAOgdin@xxxxxxxxxxxxx Leveraging technology to restore the soul of the organization