Hi, I am interested in doing 1:1 NAT using the Linux 2.2 or 2.4 kernels. I have looked in the Advanced Routing HOWTO, the IP Masquerading HOWTO, the IPCHAINS HOWTO, and other such documentation on the web, and nowhere is a clear instruction on how to set up 1:1 NAT on Linux. I've searched on Linux-related websites and Google, but I find no clear information. 1:1 NAT is _extremely_ common, and I'm surprised that there isn't a step-by-step HOWTO for it like there is for most Linux applications. What I have found indicates that ipchains in Linux 2.2 is not capable of 1:1 NAT, but Linux 2.4 is. Is this true? I'd prefer to stick with Linx 2.2 because I need H323 over IP Masquerading and I haven't found such an add-on module for Linux 2.4. Is there some clear documentation that associates all of the Linux network utilities with kernel version? So far I've come across ipfwadm, ipmasqadm, iptables, ipchains, and ip. From what I gather, iptables works with Linux 2.4 and ipchains works with Linux 2.2. I know that ipfwadm works with the Linux 2.0 kernel, but what about the others? I've successfully used ipfwadm with Linux 2.2... Any help would be greatly appreciated. Thanks, Erik. - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html