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Anyway to find the IP of a router...? plus some other questions regarding network config...

B

BuckNaked

Diamond Member
I am trying to do some work on a network that I didn't configure... The network consists of a Dishnetwork satelite connection with the modem connected to a Win2K box running ICS. Connected to that is a linksys BEFSR41 router and then 3 computers running off that. The cable from the Win2K box actually plugs into the uplink plug rather than the WAN plug, and I am not sure why that is the case, but its at the expense of being able to connect a 4th computer. Any one have an answer why this might be neccasary?
Also, I am trying to figure out the IP address for the router so I can access the the interface, but its not the default IP address (192.168.1.1) and have tried quite a few combinations, but no luck. I don't want to reset the router until I see how its configured. Any help would be greatly appreciated...

Dave
 
You have some conflicting info here...

First you say the network is setup like so...

Internet ------ WIN2K ICS -------- Linksys 4port Router ------- 3 computers

This would require 2 NIC's on the Win2k Box. You would also be "Double NAT'd".

But then you say the Win2k box is plugged into the uplink port of the router, which would be on the LAN side.

Sounds like its more like this

Internet ------ Linksys 4Port Router --------- 3 computers plus Win2k Box.

Where does ICS come into play??

If the second scenerio is the case, the router IP address would be the default gateway of all the machines on the LAN side of the router. On the Win2k box you should be able to type at a command prompt "ipconfig /all" and then the Default Gateway is your Router IP address.

 
Actually the Modem is connected to the Win2K box by USB and that connection is setup with ICS, with an ethernet card running out to the router. The satellite connection requires a windows based machine as the gateway, no way to run a router off the modem. I plan on putting a second NIC card in the box and getting away from the USB connection, but just trying to get other things sorted out first. Thanks for the response by the way....

Dave
 
Ok... well if the Win2k box is the gateway, then there is no need for the Linksys Router since you already have a "router" in the Win2k Box + ICS.

Are you sure its a linksys router and not just a switch? If it is a router, is there anything plugged into the WAN port of it? If so, where is it going?
 
Its a linksys BEFSR41 4 port router.... Nothing plugged into the WAN port, tried switching the cable running from the gateway to the WAN port, but lost connection... I am going to look at the Win2K box a little closer and see if its running DHCP... Is it possible that they have the router configured as a switch only??? is this the way you would configure it if you were going to run it this way???.... I am not totally up to speed with networking but can usually figure my way around, but this seems like a pretty non-standard way to have configured things... I wish I could find the IP to the router, would like to see how its configured, it would probably answer some questions.... Thanks again for your help! If there is anything you can think of, please let me know.

Dave
 
It would appear whoever set it up, bought the router thinking they would plug the satellite connnection into it, and share the connection with that. When they found out that it was a USB modem, they had to change their plans.

My guess is that the router is providing the DHCP, and other than that is being used as a switch.

You should be able to do an "ipconfig /all and get the IP address of the DHCP server.
 
ipconfig/all shows the dhcp address as 192.168.0.1 which is the gateway machine, but the gateway doesn't have dhcp installed..... I am stumped....

 
So the IP address of the Win2K box is 192.168.0.1?

Is there any software that the satellite company provided that could be running a DHCP server?
 
No, there is software running (thats why it requires a windows based gateway) but its just an application accelerator and web browser accelerator thats proprieatary to the satellite connetion requirements...

 
where did you run this IPConfig at?

Is the Win2k IP address Static?

Are the other three machines running static or DHCP? I assumed DHCP before... is it possible they are set to static?

Run an IPConfig on one of the other boxes, see what it tells you.
 
where did you run this IPConfig at?
Click to expand...
I have run it off of two of the boxes that are connected to the router... Also off of the Win2K box... The win2k machine is remotely administered with PC Anywhere, but its a local machine.

Is the Win2k IP address Static?
Click to expand...
yes

Are the other three machines running static or DHCP? I assumed DHCP before... is it possible they are set to static?
Click to expand...
They are running DHCP


Run an IPConfig on one of the other boxes, see what it tells you.
Click to expand...
Off my machine (one of the three on the router):
IP Address........... 192.168.0.117
Subnet Mask.........255.255.255.0
Default Gateway...192.168.0.1

Off of second machine:
IP Address............192.168.0.23
Subnet Mask.........255.255.255.0
Default Gateway...192.168.0.1

Off of third machine:
IP Address............192.168.0.121
Subnet Mask.........255.255.255.0
Default Gateway...192.168.0.1


 
I missed this before, but looking under the tcp/ip properties for the modem connection (there are two LAN connections, 1 for the modem and one for the ethernet card), it does in fact have dhcp enabled.... Since this is for the modem and the ICS setting, is this the DHCP that sets the IP addresses for the other machines?
 
Windows IP Configration

Host name.................... TPR-Sierra
Primary DNS Suffix........ (blank)
Node Type.................... Mixed
IP Routing Enabled....... No
WINS Proxy Enabled..... No


Ethernet adapter Local Area Connection

Description......................... Intel Pro/100+ Management Adapeter
Physical Address................ 00-90-27-8c-4b-XX
Dhcp Enable....................... Yes
Autoconfiguration Enabled. Yes
IP Address......................... 192.168.0.117
Subnet Mask...................... 255.255.255.0
Default Gateway................ 192.168.0.1
DHCP Server...................... 192.168.0.1
DNS Server........................ 192.168.0.1
 
Well, that Win2k box is running a DHCP server...

I don't know enough about ICS to tell you if thats part of it or not.

I think we answered most of your questions. Just not how to determine the linksys IP address. I don't know any tricks that would help you out. The only thing I can think of is to start pinking 192.168.0.x address's and go until you get a reply. Maybe do a few more likely ones first (254, 250, 200, 100, 10, ect)
 
I would do a google search for an IP scanner and scan 192.168.x.x on port 80. That should give you your Linksys addy.
 
your best bet in finding out the Routers ip is to use one of the boxes on the other side of the lan, not the Win2k box which has the ICS running, type ipconfig/all if it is a win2k/xp box, if 9x then type winipcfg under START|RUN look for gatway. the ip for the router will be that string. if you are unable after finding the ip to connect to the router via a web browser i.e. typing in the routers ip to remote administor, then most likely you have a linksys switch as these do not necissarily require a web administerd gui. Being that ICS sucks big ones you might do a google search for any internet sharing utility most will probably be better then windows ICS. Or, if you have a copy of win2kserver, you could run my favorite "Routing and Remote Access" very nice util. much better then ics.
Confide.
 
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