Connecting two subnets with a multihomed Win2K box

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From: Andy (anonymous_at_discussions.microsoft.com)
Date: 07/29/04 

Date: Wed, 28 Jul 2004 20:47:45 -0700

Hi all!

I'm feeling like a big schmuck... I've been trying to get
this thing working for a few hours, but haven't quite had
any luck yet.

The network looks like the following:

Cable modem---> wireless router----> Computer A
                192.168.2.1 192.168.2.25
                  |wired| (wireless)
                     | 192.168.3.1
                  Computer C (wired)
                 192.168.2.13 |
                                        Computer B
                                        192.168.3.7
                                          

(If the formatting above gets messed up: Computer C is
hooked up to the wired side of a wireless router. Computer
A hooks up wirelessly to the wireless router. Computer A
also has an ethernet card connected via a switch to
another subnet, containing Computer B.)

Both network segments work OK independently. That is,
computer A can access the internet and Computer C without
any trouble. (Computer C can also access computer A
without any trouble.) Computer B can access computer A and
vice versa.

Computers A and B are both running Win2K Pro... can't
quite bridge the connections as easily as with WinXP. IP
Routing is enabled with the registry key on computer A.

Route print on computer A brings up the following:

===========================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 50 bf 21 00 51 ...... Realtek RTL8139/810x
Family Fast Ethernet NIC

0x3 ...00 e0 98 be 31 ca ...... TNET1130
===========================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.2.1 192.168.2.25 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
192.168.2.13 255.255.255.255 192.168.2.1 192.168.2.25 1
(Added by me.)
192.168.2.25 255.255.255.255 127.0.0.1 127.0.0.1 1
192.168.2.255 255.255.255.255 192.168.2.25 192.168.2.25 1
192.168.3.0 255.255.255.0 192.168.3.1 192.168.3.1 1
192.168.3.1 255.255.255.255 127.0.0.1 127.0.0.1 1
192.168.3.255 255.255.255.255 192.168.3.1 192.168.3.1 1
224.0.0.0 224.0.0.0 192.168.2.25 192.168.2.25 1
224.0.0.0 224.0.0.0 192.168.3.1 192.168.3.1 1
255.255.255.255 255.255.255.255 192.168.3.1 192.168.3.1 1
Default Gateway: 192.168.2.1
===========================================================
Persistent Routes:
None

An ipconfig /all on computer A gives:

Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : compa
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection 2:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 802.11g Wireless PCI
Card
Physical Address. . . . . . . . . : (snip)
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.2.25
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.2.1
DHCP Server . . . . . . . . . . . : 192.168.2.1
DNS Servers . . . . . . . . . . . : 192.168.2.1
Lease Obtained. . . . . . . . . . : Wednesday, July 28,
2004 11:39:31 A

Lease Expires . . . . . . . . . . : Wednesday, August 11,
2004 11:39:31
AM

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8139/810x
Family Fast Ethernet NIC
Physical Address. . . . . . . . . : (snip)
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.3.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . :

A traceroute from computer B to 192.168.2.13 gets stuck
after hitting computer A (192.168.3.1).

Ideally, what I want to do is to allow computer C to
access an SMB share on computer B.

*Whew!* I've played around with route.exe but haven't
gotten anywhere. I can add routes, but... :\

Any help anyone might be able to provide would be grand!
I'm probably missing something so simple...

(There are a thousand easier ways to do this... am just
trying to figure out how the routing in Win2k Pro works.)

Thanks very kindly! :)

Andy

Relevant Pages

  • Re: Jose - ping trial - connectivity problem
    ... Ethernet Adapter Local Aea Connection: ... Description Realtek RL8139/810x Family Fast Ethernet NIC ... It is a home network. ... Ping equest could nto find host www.google.com. ...
    (microsoft.public.windowsxp.help_and_support)
  • Re: ICS host cant access internet
    ... Ethernet adapter Local Area Connection: ... Ethernet adapter Wireless Network Connection: ... Persistent Routes: ...
    (microsoft.public.windowsxp.network_web)
  • Re: Split tunnel
    ... you could specify that the connection does not use the gateway provided by ... needed to connect to the networks accessed via the VPN ... >> specific routes for the VPN. ... >>>I have a client that is using a PPPTP VPN to connect to there network. ...
    (microsoft.public.win2000.ras_routing)
  • something through nat - something not
    ... box is connected to one network with 2 interfaces ... these nodes that do have routes to inside net pointing to this box use gif/ipsec tunnels to route packets to inside net ... Internet connection sponsored by Iskon Internet d.o.o. ...
    (freebsd-questions)
  • Re: PCs Network connection stops working when connecting via ActiveSync + USB?
    ... connection to the network is gone for a 30 seconds to a few mins... ... (and many other consumer products)... ... Persistent Routes: ... What are the characteristics of your LAN connection? ...
    (microsoft.public.pocketpc.activesync)