Friday, July 2, 2010

Network Setup

Since both the back-office PC and the Passport must be on different WANs, we have to get them to work on the same LAN. These are the steps we take to accomplish this.

INTERNET routers have a LAN which has an address of 192.168.1.???, with a subnet mask of The Internet needs to be accessed by the security system,, Scott's POS Service, the back-office PC (in the store), and anything else that might require an Internet connection to the store. The INTERNET router has wireless enabled for the hand-held scanners to use in receiving and auditing, and for our laptops as we are setting up the store. At this point the DNS will need to be determined at the location.

SATELLITE routers access a private WAN used for credit card processing and have NO Internet access. The SATELLITE routers are in a LAN with an address of 10.5.48.??? with a subnet mask of The SATELLITE routers provide WAN access to the Passport registers and gas pumps in order to process credit cards and a LAN for all the petroleum equipment to function in harmony.

Our first step is to set up the INTERNET router to enable wireless access and forward ports 3389 and 1433 to an IP address of and confirming the WAN IP and DNS server addresses. We then disconnect the INTERNET router from the back-office PC as it will be connected to the GATEWAY router later.

The GATEWAY router provides Internet access to our back-office PC and sits on a LAN with the Passport POS devices in a workgroup named 'PASSPORT'. An IP conflict can crash the POS devices and the pumps. It is better to connect the back-office PC to the SATELLITE router first and let it assign an IP address which is usually Using IPCONFIG on the back-office PC, we can confirm the IP address assigned by the SATELLITE router. Once this is done, we can go to the next step of setting up the GATEWAY router.


First we disconnect our back-office PC from the SATELLITE router, connect the GATEWAY router to the back-office PC and enter router setup. The GATEWAY router should be set to use a static IP address of with a subnet mask of and a gateway address of the INTERNET router — usually We use the DNS server address we acquired from the INTERNET router. Depending on the store these addresses would be something like and

The next step is to set up the GATEWAY router LAN IP address to or the address we saw previously with the IPCONFIG step above. We set the subnet mask to

BE SURE TO DISABLE DHCP ON THE GATEWAY ROUTER so the Passport equipment does not pull and IP address from the wrong router and crash the petroleum equipment.

Next, connect a CAT 5 (Ethernet) cable from the SATELLITE router to the GATEWAY router to allow the SATELLITE router to assign yet another IP address to the back-office PC which will most likely be, and can be verified again by using IPCONFIG on the back-office PC.

To insure the POS device and pumps are not affected, it's best to disconnect the CAT 5 going to the SATELLITE router until the set-up is finished.

Go to the TCPIPv4 properties in the back-office PC and give the back-office PC an assigned address of or whatever the address was in the previous IPCONFIG exercise. The subnet mask will be with a GATEWAY address of (or whatever we assigned as the GATEWAY router LAN IP). The DNS server address will also be the same.

Connect the CAT 5 cable from the INTERNET router to the GATEWAY router Internet-in slot. We should now have access to the Internet from the back-office PC.

Forward ports 3389 and 1433 from the GATEWAY router to the IP address of the back-office PC. Connect the CAT 5 cable from the SATELLITE router to an open slop on the GATEWAY router. Set up the network on the back-office PC with a workgroup name of PASSPORT and reboot the back-office PC. We should now have the Passport POSSERVER01 in our workgroup computers.

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