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I am on an intranet that is not connected to the internet and a wifi router with connection to the Internet. When am connected to the router, I can browse the Internet but cannot browse my LAN with my Ethernet cable connected.

How can I browse the Internet via my wifi router and at the same browse my local lan web app via my connected Ethernet cable?

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How do you access "LAN applications"? Could you give us an example of the web address you are using to access them? Could you confirm that when you say "it tries to connect to the internet" you mean that when you try to access a LAN application it somehow tries to look for this application on the internet? How did you configure the network on your computer (both wireless and ethernet)? –  Huygens Mar 3 '13 at 21:07
@Huygens I use the following address for my LAN web based apps: xxx.xxx.com/weberp. or And it tries to go to the internet. Both connections are DHCP. –  omadegbo Mar 4 '13 at 0:33
What is nslookup xxx.xxx.com returning for IP on the Wireless and what is it returning on the ethernet LAN? In addition, what is the subnet of your DHCP Wireless LAN and what is the sunet of your DHCP ethernet LAN? Finally, what is the routing table when you are connected to the ethernet LAN (route -n)? –  Huygens Mar 4 '13 at 8:37
For what i understand, the wireless and wired are 2 different connections, there should be no problem for your system to resolve local names through your lan interface. Can you provide us some info on your ip addresses / subnet mask? Run the following command on your console and give us the results: ifconfig or ip add Post the results. –  jmsaraiva Mar 4 '13 at 14:35
you have to choose one or the other, they both do the same function, Ethernet overrides wifi. –  Sean Jul 24 '13 at 3:37
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1 Answer

I still do not have enough informatino for giving you an answer in which I am 100% confident, but here are a few hypothesis.

  • When connected on the cabled LAN, you are on a different subnet than when using the Wireless LAN. The routing between these 2 LAN is not configured, and thus when requesting an IP range that is not in the current active LAN, the packet are sent to the "default" interface, usually the gateway/router.
  • You have both Wireless and wired connection active, but the wired one is activated after the wireless and whatever network management tool you are using is just replacing the route table entries with the last activated connection. Thus, when you activate the wired connection, the previous routing table is "cancelled/removed". You may need to adjust the routing manually in your network management tool.
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