Static IP addresses from ISP

[hoemee]

Hello,

I need some help on the theory/technical aspects of static ip addresses...we currently have a modem and service through roadrunner - tomorrow I will be getting a different modem from them and setting up our SBS 2003 network with static ip address(es) to deploy Microsoft Exchange - I have been told we need static ip's for this......here is my question: where do I put these static ip adresses? We are running a Linksys wrt54gs router, with a switch and one NIC card on the server....the mobo does have an NIConnection on board, but it is disabled - is inside the router where I will select static IP for internet connection source and then enter the settings given to us by Time Warner such as subnet mask, gateway, etc...?

Now - this is not the same as setting each client computer with a static IP is it?

[GroundZero3]

Your router will have the static ip address. Since you are using a linksys, you will give the server running exchange a static ip address with the private subnet you are using (linksys default is 192.168.1.x/24). So if the router is 192.168.1.1/24 your server should have an address such as 192.168.1.2 subnet 255.255.255.0 and gateway of 192.168.1.1. Make sure you dont pick an address in your DHCP range. (linksys starts off at 192.168.1.100 and goes on up)

You will need to forward the ports in the router to the exchange server to allow incoming connections to the mail server.

Power off your router, install the new modem and power the modem on. Power on your router and allow them to sync. You will need to go into the router web interface to set the static ip address info RR gives you.

[hoemee]

Wow - thank you for the quick reply...our router right now is using 192.168.1.1 for an ip address and I have the following ports forwarded right now:

RDC 3389
SMTP 25
POP3 110
VPN 1723

All enabled to the IP address of 192.168.1.105

...now you said the server should have an address of 192.168.1.2 - does that mean I will change the current Ip adress of 192.168.1.105 which our server is currently using?

[GroundZero3]

You can give whatever address you want (i was just giving 192.168.1.2) as an example.

Was that 192.168.1.105 a DHCP address given from the router or a different DHCP server? If it is a DHCP address, I don't think the default linksys firmware can do DHCP reserves (im not sure, i don't use it). If you can setup a DHCP reserve than you can keep the .105. If not you will need to change the address (outside the DHCP scope) of the server and change the port forwards.

[hoemee]

Not sure - inside the router DHCP is enabled and static dns1 is set to 192.168.1.105....now are you talking about changing the server address in the router or in DHCP in SBS 2003.........

[GroundZero3]

Looks like you have DNS running on your server.

What is your DHCP range?
From your last post, I just want to make sure. You running the DHCP server on the SBS server?

[hoemee]

yes- the DHCP is running on the server, and the address range for distribution is 192.168.1.40 to 192.168.1.80

192.168.1.1 to 192.168.1.9 and 192.168.1.105 are excluded for distribution

at least I think I am running it...............

here is the cable modem I just picked up from Time Warner:

Ambit

[GroundZero3]

Then all you need to do is assign the static ip address to the linksys router when you get it.

[hoemee]

If the server's ip address is 192.168.1.105, then why do I use 24.39.29.198 to remote desktop in?

[GroundZero3]

24.39.29.198 is your networks public ip address (that is what people on the internet see)

192.168.1.105 is your Natted address (private)

HowStuffWorks "How Network Address Translation Works"

This should explain it

[hoemee]

The static is up and running - I had to change my stored RDC ip address to reconnect - to the new static ip.........one question - I can still log into the router with either the new static or the default 192.168.1.1 - why?

[GroundZero3]

You can or cant?

You should be able to log into the web interface still even with the static ip address

[hoemee]

I can - I can log into my router with both ip addresses - the new static and the router ip

[GroundZero3]

Well both addresses are on the router so im not sure what your question is. It should have been the same before you added the static ip address.