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I have seen a couple of questions about this, but I am so limited in my networking knowledge that I have been unable to get those solutions to work for me.

I am trying to connect to an intranet so that I can navigate to internal sites (such as Sharepoint, etc.), but I also need to be able to access my internet over a Wi-Fi connection, which is a 3G Mi-Fi.

What's currently happening is that, when I have the ethernet cable plugged in and Wi-Fi on at the same time, my internet works, but I cannot access the intranet. And it is really a huge pain to switch between the two.

My network details are below (not sure what other details would be needed?):

Wireless:

Default Gateway: 192.168.1.1
IPv4 Address: 192.168.1.102 (preferred)
Subnet mask: 255.255.255.0
DNS: 192.168.1.1

Wired:

Default Gateway: 172.23.42.1
IPv4 Address: 172.23.42.165 (preferred)
Subnet mask: 255.255.255.0
DNS: 172.24.130.12

My Operating System is Windows 7.

Edit - Additional Info:

===========================================================================
Interface List
15...60 67 20 52 19 f8 ......Intel(R) Centrino(R) Advanced-N 6205
19...60 67 20 52 19 f9 ......Microsoft Virtual WiFi Miniport Adapter #2
16...60 67 20 52 19 f9 ......Microsoft Virtual WiFi Miniport Adapter
14...d4 be d9 6a 63 f0 ......Broadcom NetXtreme 57xx Gigabit Controller
18...74 e5 43 54 5d a4 ......Bluetooth Device (Personal Area Network)
 1...........................Software Loopback Interface 1
26...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3
20...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #5
11...00 00 00 00 00 00 00 e0 Microsoft Teredo Tunneling Adapter
23...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #6
25...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #8
===========================================================================

IPv4 Route Table
===========================================================================
 Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
        0.0.0.0          0.0.0.0      192.168.1.1    192.168.1.101    281
        0.0.0.0          0.0.0.0      172.23.42.1    172.23.42.164    276
      127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
      127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
    172.23.42.0    255.255.255.0         On-link     172.23.42.164    276
  172.23.42.164  255.255.255.255         On-link     172.23.42.164    276
  172.23.42.255  255.255.255.255         On-link     172.23.42.164    276
    172.23.45.0    255.255.255.0      172.23.42.1    172.23.42.164     21
    192.168.1.0    255.255.255.0         On-link     192.168.1.101    281
  192.168.1.101  255.255.255.255         On-link     192.168.1.101    281
  192.168.1.255  255.255.255.255         On-link     192.168.1.101    281
      224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
      224.0.0.0        240.0.0.0         On-link     172.23.42.164    276
      224.0.0.0        240.0.0.0         On-link     192.168.1.101    281
255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
255.255.255.255  255.255.255.255         On-link     172.23.42.164    276
255.255.255.255  255.255.255.255         On-link     192.168.1.101    281
===========================================================================
Persistent Routes:
Network Address          Netmask  Gateway Address  Metric
  172.23.45.0    255.255.255.0      172.23.42.1       1
===========================================================================

IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination      Gateway
 1    306 ::1/128                  On-link
14    276 fe80::/64                On-link
15    281 fe80::/64                On-link
14    276 fe80::7d76:b186:8068:d63a/128
                                On-link
15    281 fe80::d0f1:717e:6cbb:fa95/128
                                On-link
 1    306 ff00::/8                 On-link
14    276 ff00::/8                 On-link
15    281 ff00::/8                 On-link
===========================================================================
Persistent Routes:
None

Please advise.

share|improve this question
1  
Please draw a diagram to describe your network layout. –  Ramhound Jan 27 at 13:53

2 Answers 2

You need to add static routes for the intranet network.

Example: (from a CMD box)

route add 172.23.45.0 mask 255.255.255.0 172.23.42.1 -p

172.23.45.0 is the network you want to reach. 172.23.42.1 is the gateway that will get you there. -p to make it persistent, it will remain after you restart your computer.

share|improve this answer
    
Thanks so much for your help. I have done that and the intranet is now working, but the internet (personal Wi-Fi) is not. I do have limited internet access over the ethernet cable, but things like my Outlook won't connect/Dropbox won't sync/I'm unable to use Internet Download Manager because everything asks for a proxy. Is there a way to test whether I've implemented your suggestion correctly? –  Amy Jan 27 at 15:21
1  
You need to set the priority order of your Network Adapters so that the Wi-Fi is the first. You can do it with: Control Panel -> Network and Sharing Center -> Change adapter settings (from the left panel). And then press ALT to show the menu. Go to the Advanced Menu -> Advanced Settings. Move your wireless connection to the Top. –  Cesar Jan 28 at 2:51
    
Thanks. I have been into the adapter settings and all of the Wireless connections were already at the top of the list. So I just made sure that the Wi-Fi connection I'm using is at the very top. But the issue remains - when the ethernet cable is plugged in, my Wi-Fi doesn't work and the browser asks me for proxy username and password. Was the 'example' you typed in your answer above, exactly what I needed to type? Because I added it exactly as you'd written it. –  Amy Jan 28 at 8:06
1  
Yes, you only need to change the subnetwork that you need. How many networks does your intranet have? please run "route print" from a CMD box and copy-paste it in your question. –  Cesar Jan 28 at 14:21
    
Okay, I have done so. –  Amy Jan 28 at 15:25

I think your problem is that you have two default routes (0.0.0.0).

So I'm clear, your Internet connection is via the wireless interface (192.168.1.x/24) and your intranet is via the wired interface (172.23.42.x/24). Is that correct? I'm further assuming that your intranet exists entirely at 172.23.42.x/24 and that 172.23.45.x doesn't actually exist. (Not sure where @Cesar got that from). Note: The '/24' annotation is shorthand for a 24-bit netmask, or 255.255.255.0.

On the assumption that the above is accurate, you need to delete the default route for the intranet interface.

route delete 0.0.0.0 mask 255.255.255.0 172.23.42.1

The following route, from your routing table, takes care of getting intranet traffic to the right place:

172.23.42.0    255.255.255.0         On-link     172.23.42.164    276
share|improve this answer
    
But you'll have to do this ROUTE DELETE as shown above each time you connect the adapters (I assume one or both may be USB). –  codenoire Jan 29 at 0:57
    
You are correct. It would be fairly simple to wire it up to a Windows event, however. In Microsoft-Windows-Dhcp-Client/Operational, event Id 50058 is "Your computer was successfully assigned an address from the network, and it can now connect to other computers." @Amy, if you need help setting it up, I can get you some screenshots. –  BillP3rd Jan 29 at 2:23
    
Thanks, BillP3rd. You are correct - the internet is via wireless and intranet is via wired. I tried your suggestion, but it said "Route deletion failed: Element not found". Not sure where I'm going wrong? –  Amy Jan 29 at 8:32

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