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I'd like to find out the problem of my network configuration

I have network configuration is like in this diagram:

network diagram

The problem is between laptop1 and laptop2. At first I thought it was samba server problem. I was configuring samba server on one of the laptops and I wasn't able to access the shares from the second laptop no matter what I was doing. After installing/removing/configuring samba-server a couple of times I realized that the problem resides somewhere else.

Laptop configurations:

- Laptop1: ubuntu 12.04 
- Laptop2: Windows 7/ ubuntu 12.04 ( dual boot )
- Server : ubuntu 12.04

When I do "ping" from laptop2, I get "Destination host unreachable". The same situation is when I ping in other direction. When I access Laptop1 shares from Laptop2, having windows 7 loaded, I get the error message: "Error code: 0x80070035 The network path was not found."

When I ping "server" or "router" or "wifi router" from any of laptops I get a reply. The same with windows shares, I am able to access "server"s shares from Windows and Ubuntu, from any of my laptops.

Netbios can't function correctly, that's obvious, I am unable to access windows shares between laptops. I assume that on "wifi router" is a miss-configuration, but I can't find what specifically. The "Wifi router" works as Hub + wifi, it is connected to "router" not in WAN port but in LAN1.

Please, help me correctly configure the router to make them see each-other, or at least make NetBios work correctly, between laptops, to be able to access windows shares.


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closed as off topic by Sven, Michael Hampton, John Gardeniers, Magellan, Wesley Nov 29 '12 at 17:48

Questions on Server Fault are expected to relate to server, networking, or related infrastructure administration within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

I am assuming that Laptop2 will be booted into Ubuntu (we can return to Windows if necessary later). Please post output of sudo ifconfig on both Laptop1 and Laptop2 in full, followed by output of sudo iptables-save on each laptop in full. We can proceed from there. – Jim Salter Nov 26 '12 at 1:00
make sure that NetBios over TCP/IP is enable. – K.K Patel Nov 26 '12 at 7:45
Thanks for your input, but I found the cause. It was the Wireless router miss-configuration, as I suspected – slava Nov 26 '12 at 19:28
up vote 2 down vote accepted

The router has client isolation turned on, prohibiting its WiFi clients from talking to each other. Just turn it off. If you specify the make, model, and firmware (if non-standard) of the router, we can tell you the exact location and name of this option.

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Thanks!!! That was the cause. In Wireless Settings is an option AP Isolation that was enabled. After disabling, pinging second laptop worked, and I finally was able to access the windows shares. My router is Tenda W308R by the way. – slava Nov 26 '12 at 19:25
Settings found here: !Router setting page – slava Nov 26 '12 at 19:46

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