Hi All,
I have read all night about 2 NIC's in one machine (win xp), but have
no luck up till now.
Here is my setup :

NetWork A :
4 winxp computers connected to router A,  which is connected to a cable
modem for internet.
Local Ip : 192.168.2.*
Subnet : 255.255.255.0



Network B:
1 WinXp Computer Connected to router B which is connected to a DSL
modem.
Local Ip : 192.168.0.*
Subnet : 255.255.10.0
To this computer i added another NIC card, which i connected to router
A.
My wish is that this computer will be able to see the local lan of
network A, but still use the internet from Network B.

I read alot about it, not understanding half of the explanations. The
other half i tried with no success.
I tried giving manual Metric for my NIC's , giving the one connected to
router B a lower Metric.
This did work and let me use the internet from B, but when trying to
access local computers the Network Places just Freezes.
When i set the metric back to automaticly, i can see all other
computers on the lan, but my internet also goes through network A, and
not using my B router.

I am lost here, played around with removing default gateways and stuff
( i dont know much what i was doing), but all with no success.

To sum it up in a few words :
Is it possible to block internet access from one NIC card, while still
giving it access to the local lan, and having another NIC for internet
access??

Thanks in advance, i cannot seem to get this figured out myself.
Eli

This is routing issue. Posting the routing table here may help or this case study may help,

Routing One router goes to the corporation email server and another one goes to the Internet. Symptoms: you have one router connecting to the corporation for email ...
      www.chicagotech.net/routing.htm 


Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
  Hi All,
  I have read all night about 2 NIC's in one machine (win xp), but have
  no luck up till now.
  Here is my setup :

  NetWork A :
  4 winxp computers connected to router A,  which is connected to a cable
  modem for internet.
  Local Ip : 192.168.2.*
  Subnet : 255.255.255.0



  Network B:
  1 WinXp Computer Connected to router B which is connected to a DSL
  modem.
  Local Ip : 192.168.0.*
  Subnet : 255.255.10.0
  To this computer i added another NIC card, which i connected to router
  A.
  My wish is that this computer will be able to see the local lan of
  network A, but still use the internet from Network B.

  I read alot about it, not understanding half of the explanations. The
  other half i tried with no success.
  I tried giving manual Metric for my NIC's , giving the one connected to
  router B a lower Metric.
  This did work and let me use the internet from B, but when trying to
  access local computers the Network Places just Freezes.
  When i set the metric back to automaticly, i can see all other
  computers on the lan, but my internet also goes through network A, and
  not using my B router.

  I am lost here, played around with removing default gateways and stuff
  ( i dont know much what i was doing), but all with no success.

  To sum it up in a few words :
  Is it possible to block internet access from one NIC card, while still
  giving it access to the local lan, and having another NIC for internet
  access??

  Thanks in advance, i cannot seem to get this figured out myself.
  Eli

Hi Robert
First thank you for the quick reply.
Unfortuanlly i know very little about routing.
Where and how do i post it ?
I do know both my routers have static routes configurations, which i
did not setup, will this help?
With my configuration, how do i configure the routes in order to work
my scenirio?
Thanks again,
Eli

Hi again Robert,
Found how to print my routes.
These are the routes for my machine B, the one that has two nics.

tnx again

IPv4 Route Table
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x3 ...00 13 d4 53 d1 6b ...... NVIDIA nForce Networking Controller -
Packet Scheduler Miniport
0x30002 ...02 13 d4 53 e1 0b ...... MAC Bridge Miniport - Packet
Scheduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface
Metric
          0.0.0.0          0.0.0.0      192.168.2.1    192.168.2.101
20
        127.0.0.0        255.0.0.0        127.0.0.1        127.0.0.1
  1
      192.168.2.0    255.255.255.0    192.168.2.101    192.168.2.101
20
    192.168.2.101  255.255.255.255        127.0.0.1        127.0.0.1
20
    192.168.2.255  255.255.255.255    192.168.2.101    192.168.2.101
20
        224.0.0.0        240.0.0.0    192.168.2.101    192.168.2.101
20
  255.255.255.255  255.255.255.255    192.168.2.101                3
  1
  255.255.255.255  255.255.255.255    192.168.2.101    192.168.2.101
  1
Default Gateway:       192.168.2.1
===========================================================================
Persistent Routes:
  None

We have many issues.
1. I don't see 192.168.1.0 subnet.
2. Why do you use mask 255.355.10.0?

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
  Hi again Robert,
  Found how to print my routes.
  These are the routes for my machine B, the one that has two nics.

  tnx again

  IPv4 Route Table
  ===========================================================================
  Interface List
  0x1 ........................... MS TCP Loopback interface
  0x3 ...00 13 d4 53 d1 6b ...... NVIDIA nForce Networking Controller -
  Packet Scheduler Miniport
  0x30002 ...02 13 d4 53 e1 0b ...... MAC Bridge Miniport - Packet
  Scheduler Miniport
  ===========================================================================
  ===========================================================================
  Active Routes:
  Network Destination        Netmask          Gateway       Interface
  Metric
            0.0.0.0          0.0.0.0      192.168.2.1    192.168.2.101
   20
          127.0.0.0        255.0.0.0        127.0.0.1        127.0.0.1
    1
        192.168.2.0    255.255.255.0    192.168.2.101    192.168.2.101
   20
      192.168.2.101  255.255.255.255        127.0.0.1        127.0.0.1
   20
      192.168.2.255  255.255.255.255    192.168.2.101    192.168.2.101
   20
          224.0.0.0        240.0.0.0    192.168.2.101    192.168.2.101
   20
    255.255.255.255  255.255.255.255    192.168.2.101                3
    1
    255.255.255.255  255.255.255.255    192.168.2.101    192.168.2.101
    1
  Default Gateway:       192.168.2.1
  ===========================================================================
  Persistent Routes:
    None

Hi Robert,
I dont know where subnet 192.168.1.0 is.. i know nothing about routes.
one nic uses 192.168.0.3 (part of the 192.168.0.* subnet, and the other
nic uses 192.168.2.101 part of 192.168.2.*).
Do i need 192.168.1.0???
Also I changed the mask of my 192.168.0.* to 255.255.10.0 , as i read
somewhere having two nic's require two diffrent subnets. I can change
the router back to use 255.255.255.0 , as my other router and subnet
has.
I do not know where to go from here on though, any help would be
great..
tnx

Robert L [MVP - Networking] wrote:
Show quoteHide quote

Just a thought - uplink B to A?

Show quoteHide quote

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