Benjamin Smith wrote: > Ok, > > I have a challenge - get two services working over a single port. (!) Sometimes it's a web service, sometimes it's a VNC service. Here's what I had in mind: Let's step back; what problem are you trying to solve? It seems to me this odd requirement might not be the best solution. > > 1) Server is normally a webserver listening on port 80, and normally has the following rules active: > # iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT > # iptables -t nat -A POSTROUTING -j MASQUERADE > > > 2) Server hosts a special PHP script, that when called correctly, sets rules like > > # iptables -I PREROUTING -p tcp -s $REMOTE --dport 80 -j DNAT --to-destination $FWIP:$FWPORT > # iptables -I FORWARD -p tcp -s $REMOTE --dport 80 -j ACCEPT > > The *next* tcp connection from their computer to the webserver will get NAT'd to service $FWIP:$FWPORT. > > But I want this rule cleared out as soon as the connection is made with the latter altered rules. Is there a way to write a rule or set of rules that, when activated, then delete themselves? The "ESTABLISHED,RELATED" rule should keep the connection alive even after the latter rules are killed, right? > > Is this possible? Am I just out in left field? > > > ------------------------------------------------------------------------ > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos -- Cheers John -- spambait 1aaaaaaa at coco.merseine.nu Z1aaaaaaa at coco.merseine.nu Please do not reply off-list