Managing 5 Static IP's in a Linksys

September 10, 2005 at 21:31:37
Specs: W2K Server, P4 - 3.06 / 3G RAM

I have a quick question as a newbie about networking that I was hoping someone might be able to help out with. I have recently upgraded my service with my provider where they provide an SMC8105WG router with 5 static IP addresses. However, you can only have the one port open for 1 IP and then they expect you to use a router for to access the other IP's. There in lies my problem. The linksys router only allows for 1 static IP so I have no way to effectively assign the other IP's. Essentially, the router receives the one IP from the SMC modem and then my PC and SERVER can then access the Internet through the Linksys router. My issue is how can I set up the linksys router (BEFW11s4) to route the other 4 IP's to the iis server on my W2003SERVER box? Is there a way to setup the iis I can take advantage of port or application forwarding in linksys?
Any help would be greatly apprecidated.

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September 10, 2005 at 22:01:51

What kind of connection to the internet do you have? Cable, DSL, T1? The Linksys router you are trying to use won't work because its a NAT router, and like you said, will only work with 1 IP address. I was never successful with setting up static routes on Linksys routers.

Typically T1 providers will provide customers with blocks of IP addresses. Depending on the WAN technology used on the T1 link (Point to Point, Frame Relay), the customer's router will need a T1 WIC card which gets assigned a single IP address and subnet mask. The customer is then provided with a block of IPs to use on their internal LAN. One of these IP addresses is usually assigned to a Fast Ethernet interface on the router, and this becomes the default gateway for the nodes on the LAN.

Routers else where on the internet will be setup and have their routing tables configured to route packets destined for your block of IP addresses to your LAN, hop by hop. When working with Cisco routers in basic networking environments, assigning the IP addresses to the appropriate interfaces is usually enough and requires no technical manipulation of the routing table for your network to operate properly.

If you can provide more details about your connection I can try to point you in the right direction.

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September 11, 2005 at 03:19:51

have a read here:

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September 12, 2005 at 08:36:50

If a isp provides a T1 with a block of ip you are not routing you are bridging to the isp. There is a major difference between the two.

With a regular SOHO router I don't know how you could use the other 4 public ip addresses. For NAT to work the wan ip and the lan ip have to be different. SOHO routers don't give you the option of multiple ip addresses as that would infer multiple wan interfaces. Your router may support DMZ but that is only one ip address not 4. This is not port forwarding which involves only one ip address and it granularity of control.

Did you ask the ISP how to use the ip addresses with the equipment they provided?

Golly gee wilerkers everyone. Learn to Internet Search

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