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Linux LAN with one modem link to ethernet

Posted on 1997-02-15
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Last Modified: 2010-03-17
Hi,

    In our small company we have three Linux form a LAN.  Only one Linux (server) has a modem link to outside through
ppp account we got from internet provider.  How to setup
the server so that when server link to internet through ppp,
the other Linux boxes can also connect to internet without
telnet or rlogin to server first?  I guess I need ARP, Proxy
or maybe ip tunneling stuff but just don't know how to start.  I am appreciated for any suggestion and help.  It will be great if someone can give me a working example and show me how they did it.  Thanks a lot.

    Kuang-chun Cheng
    kccheng@hycppc01.fnal.gov
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Question by:kccheng021597
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mstonge earned 100 total points
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This is quite simple.

The first thing that you will need however is a block of static IP's from your provider.  You don't need a whole Class C but you should get a small block.  Your provider should not have any problem with that.

Second, you need to set an IP address on your LAN adapter on your server.  Take that address from your block of static IP.  This address will be the default gateway for any other machine on your LAN.

Next you need to set-up you dial-in script which is probably done.

Last you must ensure that IP forwarding is turned on in your kernel parameters.


If you need specific details for any of the points above just put a comment and I will be happy to carry on this thread.
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