Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am having a hard time setting up a home network on two Windows 7 machines. The situation is complicated by the fact that the internet access is via a USB 3G Modem device on the one machine.

The setup is two Windows 7 Home machines, one Desktop PC and one Laptop. The two are connected via ethernet cable to a router. There are not other devices on the router. See the image below:

( Bummer, not enough Rep to post the image - here is an ASCII alternative: )

[3G Modem]<---USB--->[DesktopPC]<---CAT5--->[EthernetRouter]<---CAT5--->[Laptop]

I've managed to share the desktop's internet connection with the laptop. I've also got some file sharing and network discovery active. I've even convinced the laptop that this is a Home Network. However, the Desktop sees 3G Modem connection as a Home network, and the ethernet connection as "Unidentified Network". Win7 Home gives no access to SecPol so I can't change this manually.

The complication comes from the fact that the Router is not the default gateway. Had my internet connection been through an ADSL line connected to the Router, or had the Router been able to dial out the 3G, then I could set the Router as default gateway, and both PCs would recognise the network and be happy. However, I can't get the same result with the setup I have.

Please advise (in detail) on how to setup internet sharing, IP addresses, gateways and DNS servers to get this to work. I know HOW to set those things, I just don't know what to set them to.

If there is a better place online for me to ask this question, please also advise. This kind of setup is quite common in the 3rd world (I'm in Namibia) where most internet is via 3G, and I don't think it's unreasonable.


share|improve this question

migrated from May 15 '11 at 7:40

This question came from our site for system and network administrators.

I still hoping to get a working answer to this. If my question is unclear please ask for the required details. – Pieter Müller May 31 '11 at 17:20

This has been asked so many times. Please read here:

Searching google always helps.

share|improve this answer
Paul, thanks for taking the time to reply. Of course I've searched for this topic on google many times, and usually find answers exactly like the one you pointed out. However, if you read my question attentively, you'll see that the problem is not with getting the internet connection shared, this I've got working. The problem is with Windows seeing the LAN connection as "Unidentified Network". This messes up file sharing and connections for gaming on the LAN. Please read my question again. My setting are already as described in the link you posted. – Pieter Müller May 16 '11 at 6:18
I followed the instruction at the link you provided. Most of my setting were already set up that way. However, the host PC (the one with the 3G connection) still sees the network as "Unidentified Network". Any more ideas? – Pieter Müller May 31 '11 at 17:21

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.