Hi, The private adresses (192.168.254.0/255.255.255.0) of my network are sent dynamically by dhcp on my network. The dhcp server is on the firewall which address is 192.168.254.1/255.255.255.255 (this address is static). I've got a rsync server on this network which is on a separe server. His address is 192.168.254.200/255.255.255.255 (this address is static). I want that the users of the private network can make a rsync request to the firewall, and the firewall forward the request to the rsync server transparently. For the moment, I can do it with shorewall but only by specifying the client adress. I'm using masquerading and DNAT rule, in the example the client address is 192.168.254.107/255.255.255.255 : >masq file eth0 192.168.254.107/32 192.168.254.254 eth0 192.168.254.200/32 192.168.254.254 >rules file DNAT loc:192.168.254.107 loc:192.168.254.100 udp 873 - DNAT loc:192.168.254.100 loc:192.168.254.107 udp 873 - DNAT loc:192.168.254.107 loc:192.168.254.100 tcp 873 - DNAT loc:192.168.254.100 loc:192.168.254.107 tcp 873 - So I would prefer to redirect all rsync traffic from network. An other important thing is that all my harware are on the same subnet (gateway, server, workstations). I've tried to use SNAT and DNAT ipatbles rules to do that but without any succes : iptables -t nat -A POSTROUTING -d 192.168.254.1 -o eth0 -p tcp --dport 873 -j SNAT --to-source 192.168.254.1 iptables -t nat -A POSTROUTING -d 192.168.254.1 -o eth0 -p udp --dport 873 -j SNAT --to-source 192.168.254.1 iptables -t nat -A PREROUTING -d 192.168.254.1 -p tcp --dport 873 -j DNAT --to-destination 192.168.254.200 iptables -t nat -A PREROUTING -d 192.168.254.1 -p udp --dport 873 -j DNAT --to-destination 192.168.254.200 How can i do this ? Does I have to mark the packets ? Thanks in advance for any help, link, ... -- Aurélien MALO - amalo@xxxxxxxxx Tél. bureau : 03 21 08 52 42 - Tél. port : 06 21 54 23 80 CEntre Ressource du Développement Durable _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc