Can multiple static IPs and NAT co-exist?

[vash]

I have one static IP connected to my Netgear RT314 that I use to share my DSL for multiple machines. I now want to buy a second static IP from my ISP and give that IP address to just one machine on my network.

How will I be able to get this working? Here is my equipment:

1x Netgear RT314, connected to a ->
1x Fujitsu DSL modem (from GTE/Verizon), using a crossover cable to talk to a ->
1x SOHOware switch

This is all working fine and dandy with my static ip, but how would I physically give one of the machines the static ip? I realize that the machine could lose connectivety to my local lan, but I don't care at this point.

My goal is to have one machine on that static IP and to keep the other machines behind the NAT provided by the RT314. Is this possible? Or should I be looking into a different router that can take multiple static IPs and translate them to specific machines that still includes NAT?

Thanks! Any thoughts, tips, names/models of routers would greatly be appreciated.

vash

 

[Strych9]

One solution would be to place a switch (or hub) between your dsl modem and router. Your one machine with it's static IP can connect to the switch and then the router can also connect to the switch to pick up the other IP.

 

[Garion]

Simply put a hub between your DSL modem and your router. You can then connect your machine that needs a static IP to the hub and all should be good.

- G

 

[vash]

Great! It sounds like I have all the necessary equipment I need for this already. So, physically, instead of the dsl modem going directly to the router, it would go to the switch of the router instead, right?

Then I can have any other machine on the network specify a static ip, on the net and I'd be set! Would I have to change any of the network cables that I'm already using? Or would the existing cables, that I'm already using, be fine for this?

vash

 

[Garion]

You just have to, in essence, put a hub or a switch between the modem and the router. The router WAN port and the DSL modem are 10Mb/s, so you really don't NEED to use a switch, a hub would do fine.

In terms of cabling, the PC with the static IP would just need to be plugged into the external switch/hub instead of the internal one.

Stupid question - Do you really need a second IP? If you already have one static IP, you can just setup a host in the DMZ or forward the ports you need. The only reason I see you needing two IP's would be if you have the SAME service that needs to run on two unique machines - IE, you want two different counterstrike servers.

You might take a close look at what you really want to do - Post it here and we'd be happy to provide feedback. Doing it the way that I suggested will work fine, but will essentially divorce your outside machine from the rest of your network, not an ideal situation.

- G

 

[vash]

<< You just have to, in essence, put a hub or a switch between the modem and the router. The router WAN port and the DSL modem are 10Mb/s, so you really don't NEED to use a switch, a hub would do fine.

In terms of cabling, the PC with the static IP would just need to be plugged into the external switch/hub instead of the internal one.

Stupid question - Do you really need a second IP? If you already have one static IP, you can just setup a host in the DMZ or forward the ports you need. The only reason I see you needing two IP's would be if you have the SAME service that needs to run on two unique machines - IE, you want two different counterstrike servers.

You might take a close look at what you really want to do - Post it here and we'd be happy to provide feedback. Doing it the way that I suggested will work fine, but will essentially divorce your outside machine from the rest of your network, not an ideal situation.
>>


With the Netgear, I have lots of ports being forwarded already to one internal server that hosts numerous things. The reason for the additional IP address is for my girl, who would like to host video conferencing, web, ftp, etc from her machine. We can't do this currently with only one IP. Some of the ports that need to be forwarded also conflict with ones I already have mapped (I have a few mapped ranges that covers many ports to the server), so its a bit of a hassle to retelnet into the box, remap the ports back and hope we remember to forward them back to the original machine.

Does anyone know of a router that I can purchase which I can assign multiple IP addresses from a broadband connection? Also, I did call my ISP about buying another IP address (this is like the fifth time) and they still never call me back. I'll never call someone that I need something from on a Friday afternoon (even if they are in same time zone). Monday will be my next try for an additional IP.

Thanks again for the tips! I really appreciate it!

vash