Multiple IP addresses with T1

[Night201]

I have a T1 line and a range of IP address assigned to me.

For arguments sake, let's say those ip address are 100.100.100.11 - 100.100.100.20
and my gateway is 100.100.100.10

I have a server with 2 nics hooked up to this Cisco 1700 router. I assigned 1 NIC the address 100.100.100.11 and the gateway 100.100.100.10. This is able to access the Internet and can be reached from the outside by going to 100.100.100.11 of course. This same computer is running email as well.

Now, let's say I want to add a seperate server to do email and I want it to use another one of the available IP addresses (say 100.100.100.12). How do I do this with the router? Do I need to put a switch after the router and have 1 port going to each computer I want to assign a different IP to? Can the Cisco router run multiple ip addresses like this? I've always wondered that?

Another example, let's say I wanted to add a wireless access point and have it seperate from my internal network. I'd like to assign that to 100.100.100.13 let's say and then VPN into the 100.100.100.11 server which is running VPN.

How is this done?

 

[jattboy]

My suggestion would be that you use private IP addresses inside your network and use Network Address Tranlation (NAT) feature on Cisco router to forward the public (outside, in your case 100.100.100.11) IP address to inside local addresses.

 

[mboy]

No offense, but I would hire someone who understands oe to one NAT, routing, ACL creation, DMZ's etc.
If you don't know any of this, you have no business setting it up. if this is for a business (which I imagine it is) and you have no idea what you are dping or how to secure email server's, etc, you are creating a recipe for disaster. You couldn't possibly learn how to set this up from a post in a computing forum.

 

[spidey07]

The 1700 router will be able to handle all your addressing needs.