Internet Connection sharing using windows to linux

green4u · 07-03-2006, 07:46 AM

Here we have got 4 machines. One Machine is directly connectd to Internet using a cable modem(DSL connection), say the server machine, havin both windows and linux installations. The server machine have 2 NIC's one is connected directly to internet via modem and the other is used to configure internal routin to other machines. Internet connection is DHCP configured using the MAC id of the server NIC. The other machines are configured using the local IP address manually(192.168.0.1 thru 0.4) 0.1 is the getway which is connectd to the internet. All machines including server have windows XP installation and linux is also installed on 3 of them including server.

Internet is configured for both Linux and Windows installation on the server. For windows its configured using ICS.
The problem is that, when the server machine is booted to windows installation, the other machines those are booted to linux are not able to access internet !!

Problem in Brief:

4 Machines.

Internet connection through DSL modem.

OS intallations: all have windows and linux excluding 1, that have only windows.

Internet configuration: when server is on windows, configured through ICS. Using proxy and iptables when server is on linux

Problem: Linux machines are not able to access internet when server is windows(ICS) and clients are on linux !!

Agrouf · 07-03-2006, 08:18 AM

You need to check the box "share this internet connexion" in connection setting or something like that, depending on the windows version.

green4u · 07-03-2006, 08:41 AM

but seems working only for windows

michaelk · 07-03-2006, 08:44 AM

Are the linux PCs configured to use DHCP?

green4u · 07-03-2006, 09:11 AM

No. They are configured for static IP starts from 192.168.0.1 thru 0.4

michaelk · 07-03-2006, 10:51 AM

Since you are using a static IP address for the clients you will need to update the gateway and the nameserver addresses on the linux PCs.

green4u · 07-03-2006, 09:14 PM

Gateway and DNS address are always constant, so no need to update it manually everytime. The server machine has 2 nic. one for internal routing and the other for connecting the DSL modem

michaelk · 07-03-2006, 09:21 PM

Check the /etc/resolv.conf file of the linux clients. Does it contain any nameserver information like
nameserver xxx.xxx.xxx.xxx

Does the output of the route command show 192.168.0.1 as the gateway?

green4u · 07-03-2006, 09:36 PM

Yeah, resolv.conf file contains the DNS nameserver address, ie the orginal DNS servers in the ISP.
And the route command didn't show the gateway address, simply a * in the place of gw

jschiwal · 07-03-2006, 09:44 PM

Describe the machine that is connected to the internet. Is it running windows or linux. The easiest way would be to get a Cable/DSL NAT router. Otherwise, I believe that you want the LAN nics on a different subnet from the WAN nic on the DSL connected machine.

green4u · 07-03-2006, 09:55 PM

Inernet Connected machine has 2 NIC and both windows and linux installed. one NIC is used to connect to internal network and the other is connected to DSL cable modem.
The problem is only when the server machine is booted to windows and using ICS to share internet.

teluguswan · 07-04-2006, 05:11 AM

One Easy Proxy Server which i can suggest u is the small proxy i.e

ANALOGX Proxy.

This is very small and easy to install and almost all no configuration it requires.

so Just check this and leave the problems

give the feedback

Agrouf · 07-04-2006, 08:35 AM

Are you able to ping the server from the linux machines?
Are you able to ping linuxquestions.org by its ip address (64.179.4.146)?

green4u · 07-04-2006, 11:06 AM

i 'm able to ping the server, but not outside. like google or linuxquestions using ther ip or dns name

Agrouf · 07-04-2006, 12:13 PM

what is the output of route?