*smacks forehead* I'm an idiot. I actually had all of the rules correct, including those two you listed. However, I had them in the opposite order from what you listed. This was a problem, since both my NAT network and my workstation IP are all on the 192.168.0.x network. Therefore, since the first rule matched packets coming from my desktop as coming from the "internal" network, that rule executed and it went on its merry way. Seeing your post made me re-examine my script more closely, and that showed the problem. Thank you! -- Justin ----- Original Message ----- From: "Ken Price" <kprice@agentware.net> To: "'Justin Richer'" <ru2def@whoever.com>; <lartc@mailman.ds9a.nl> Sent: Monday, October 28, 2002 5:05 PM Subject: RE: [LARTC] 2-NIC DMZ? > *VERY* easy. No routing rules involved, just IPTABLES: > > For your workstation: > # iptables -t nat -A POSTROUTING -s 192.168.0.5 (your workstation statis IP) > -o eth0 -j SNAT --to PUBLIC_IP_1 > Then, for everyone else: > # iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to PUBLIC_IP_2 > > > -Ken > > > -----Original Message----- > From: Justin Richer [mailto:ru2def@whoever.com] > Sent: Monday, October 28, 2002 11:28 AM > To: lartc@mailman.ds9a.nl > Subject: [LARTC] 2-NIC DMZ? > > > Hi all, > > I have two static IPs from my ISP. I would like one of these IPs to be > directed to my desktop box all the time, and the other to be directed to a > DHCP-served NAT network. I've nearly gotten it working using iptables and > iproute2, but one problem is that i would like packets coming from my > desktop box via the firewall to be printed with my desktop's external IP. > They are currently being seen as from the NAT-hosted IP, which is the main > IP address of the firewall box's external NIC. My setup looks like this: > > DSL Bridge -> [eth0] Firewall [eth1] -> 8-port-switch -> static desktop > \-> (NAT cloud) > > is it possible to send packets from the firewall looking like they came from > a different external IP address based on which internal IP they were routed > from? it seems to me it really should be possible to do ... just, how? > > Thanks, > -- Justin > > _______________________________________________ > LARTC mailing list / LARTC@mailman.ds9a.nl > http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ >