Thanks, Ray. Dhcp-relay is exactly what I wanted to know about. Unfortunatly, some of the machines on the local network are running M$ Windows, which from googling I learn lacks real IP Aliasing support - you can get multiple static IPs, but not static & DHCP at the same time. So at least for the windows boxes, I will probably switch to DHCP only. Which brings up a new question: is there an easy way to change the IP address a hostname refers to when the machine's IP address changes. For example, the host named gamebox crashes, and after reboot has a different IP than before. Is there a nice way to tell all the other computers on the local net that gamebox's address has changed? I'm guessing that with how common DHCP is, there must be a way, but I don't know what it would be.
Thanks again, Conway S. Smith -- Ray Olszewski <[EMAIL PROTECTED]> wrote: > At 01:22 AM 9/19/2003 +0000, [EMAIL PROTECTED] wrote: > > > On my home network, I am currently using IP-masquerading (aka NAT) > > on my linux gateway to provide internet access for the local net. > > This has been working fine in general, but I have some problems > > with internet multiplayer in certain games that I believe are due > > to the IP-masqing. My ISP provides public addresses via DHCP, but > > I prefer having static addresses on the local net. I was wondering > > if I could use both public & private addresses via IP Aliasing. > > > > Would this work? > > > > Internet > > | > > | > > Gateway |- eth0 public dynamic address > > |- eth1:0 bridged with eth0 > > |- eth1:1 private static address > > | > > Local Net |- eth0:0 public dynamic address > > |- eth0:1 private static address > > > Whether this would work or not depends on one detail that you were too > vague about. Do you have two public addresses or only one? That is, do > you > want Local Net:eth0:0 to have the *same* IP address as Gateway:eth0 or > a > different address? > > If they need to be the same address, then I do not know how to do it > and > suspect that there is no way to do it. > > If they are different, the only piece that is not obvious is how to > get the > dynamic-public address assigned to the Local Net host. Normally, DHCP > queries and replies do not cross routers, so you need a DHCP proxy > running > on the Gateway. There is such an application for Linux, called > dhcp-relay > ... your distro's packaging system probably has it. > > You also have to get the routing table on Local Net right, so it knows > which interface/IP address to use for which traffic. And you probably > have > to proxy-arp the Local Net dynamic address on Gateway, since yuor ISP > will > not know that its public IP address is their route to the Local Net > host. > (Your bridging approach may take care of that ... I haven't done > bridging > recently enough to remember the details ... but I suspect that proxy > arp > will prove easier to implement.) > > Finally ... games do have problems with standard NAT; they often > require > port forwarding to work. Also, sometimes the clients need to be told > the > external IP address through their configuration menus (this is > something of > a nuisance when dynamic addresses change). Depending on the specific > games > you are concerned with, you might find it easier to implement port > forwarding for them. ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today! - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs
