Linksys router-Comcast modem
Posted on 2009-05-16
I inherited a network with a Linksys wireless router connected to a Comcast modem on a network running POS terminals that use static addressing.
I do not have the Linksys password for the router or the secured wireless network.
I have two handheld POS computers, one works, has internet access and connects to the POS server on the LAN, the other does not, because I do not have the password to connect to the wireless network and no one knows what it is. If I hard wire this handheld it works fine.
The wierd thing is the Comcast modem is NOT plugged into the WAN port on the Linksys, it is plugged into a LAN port.
I tried connecting a new Linksys router (same model) and when I ran the setup wizard it did not detect the Comcast modem, but if I connect that same cable to my laptop I can get out to the internet and I get a 10.1.10.x address, so something is doing DHCP.
If I do an ipconfig from the wireless handheld that does connect it shows the gateway ip as 10.1.10.1. When I enter that in internet explorer, it takes me to the Comcast modem not the Linksys router.
There a 4 other stations (hard wired) also show 10.1.10.1 as their gateway and they all have internet access, they are all connected to the Comcast modem directly.
Any ideas on why the Comcast modem is plugged into a LAN port and not the WAN port on the Linksys?
Someone told me that the Comcast modem is doing NAT and that the router is running software that has it in bridging mode. This saves Comcast a static IP. I know nothing about bridging.
How can I set up the new Linksys router so it will provide wireless and wired conection for all machines on the LAN so they can all see the POS server?
Resetting the exisitng router is not an option because then I lose the other handheld if I can't getthe wireless working again.