Re: Masquerading & diald with RH4.0 ???

[jamesrem@techlink-ltd.com]

Mr. Nemholt

Ask yourself several questions?

1) how many ip numbers do you have?  
   If you only have one then you have to do ip masquerading (which is a little 
more difficult).  if you have one ask/beg your isp for a class c address or as 
many ip addresses as you have machine attached to  your network
2) DO you have a Class C address (a range of over 250 addresses) or did your 
ISP give you more than one ip  (e.g. 38.241.72.1, 38.241.72.2 up to 10)?
address?  
   if yes  then you assign each of the win95 machines an address and configure 
their tcpip stacks to point to your linux machine. assuming that you are using 
Microsoft's stack the configuration is done under dial up networking. Having 
DNS set up on linux is very helpful also!!!! 


if you have multiple addresses you might want to add a couple of route 
statements 

/sbin/route del default;
/sbin/route add default gw xxx.xxx.xxx.xxx dev ppp0

once ppp is up.  xxx.xxx.xxx.xxx should probably be a router (check with your 
isp.  

the number of ip numbers is most useful in determining your best 
configuration.  

-------------------------------------
Name: James Rem
E-mail: jamesrem@techlink-ltd.com (James Rem)
---- Linux the operating system of choice!!!
Date: 3/20/97
Time: 8:56:21 PM
-------------------------------------
 
--- On Fri, 21 Mar 1997 11:04:13 +1100 (EST)  Robert Hart 
<hartr@interweft.com.au> wrote:

>On 20 Mar, Jesper Frank Nemholt wrote:
>> Hi!
>> 
>> I currently have a working PPP setup on my RH4.0
>> 
>> The Linux box is connected to a ethernet LAN where it currently 
>> runs as a local server for mail, www, ftp etc.
>> 
>> I'd like to make it possible to let the connected Win95 machines
>> access the internet through the Linux box and its modem based PPP
>> connection.
>> 
>> I've tried to study the PPP-howto and asked a couple of Linux
>> wizards, but I'm still a bit lost...
>
>Well - the PPP-HOWTO covers a bit about setting up PPP to link
>networks, but it assumes you know what you are doing...
>
>> Some say it's possible to let the Win95 machines access the 
>> internet, just by adding a new route on the Linux box...
>> Is this true, and if yes, the how to do it ???
>
>Yes - PROVIDED that ALL the machines on your local LAN have real, valid
>IP addresses. If this is the case, simply make sure that you have IP
>forwarding enabled in you Linux kernel (stock Red Hat kernels do have
>this enabled) and then tell the win 95 machines that the Linux box's IP
>address is their 'router' or 'gateway' in their TCP/IP configuration.
>
>> Other say that I need to do masquerading... but do I need to
>> install more components to my full RH4.0 install ???
>> I've managed to find ipfwadm, but the ipfw binary file mentioned
>> in some of the HOWTO's isn't there...
>
>If you are using invalid IP numbers (or one of the reserved sequences
>for unconnected networks), then you must run IP Masquerade - and you
>don't need ipfw - just ipfwadm.
>
>Install the HOWTO rpm and look at the IP Masquerade mini-howto in
>	/usr/doc/HOWTO/mini/IP-Masquerade
>
>-- 
>Robert Hart                             hartr@interweft.com.au
>Voice: +61 (0)3 9735 3586		http://www.interweft.com.au/
>InterWeft, 35 Summit Road, Lilydale, Victoria 3140, Australia
>        IT, data and voice networking
>        Strategic IT business planning
>        Internet planning, implementation, security and configuration
>
>
>--
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-----------------End of Original Message-----------------




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