>Hello again
>
>I appreciate the information provided about IP forwarding and Email
>below. But I was looking for some more information about where to
>start and what to do. So let me see if I can state what I think is
>the correct attack. If something is missing or wrong, PLEASE correct
>me. I will attempt to post a summary once I get this working.
>
>Initial Setup:
>
> I have three computers, one running Redhat Linux 6.0, and two
> running Windows 95, all with new unconfigured installations. They
> all contain ethernet cards, and the cabling is in place. The Linux
> box has a modem attached to access the Internet. I have a dialup
> connect to my ISP which uses dynamic IP addresses.
>
>Configuration Steps:
>
> 1. Pick names for the computers, and a domain name for the
> network. These are private names, so they are not registered to
> appear on the Internet.
>
> 2. Assign IP addresses to the machines using unrouted IP numbers
> such as 192.168.10.1-3 .
>
> 3. Configure the Windows boxes, in the networking section of the
> control panel, for their name, workgroup, fixed IP
> addresses, Wins lookup, no DNS, and no Gateway. (I plan on using
> Samba.)
>
> 4. Configure the Linux box for it's hostname, domain name, and IP
> address. Create accounts on Linux for the users of the Windows
> 95 machines. Confirm that they have mail boxes on the Linux
> machine.
>
> 5. Configure, start and test Samba. Configure Sendmail for Envelope
> masquarading using ISP domain name, and relay of internal
> systems. Configure the Windows 95 mail programs to use the Linux
> box with IMAP. Set up a procmail filter if you want the Windows
> users to have internet email. Send messages from each box to all
> the users. Configure PPP and diald for Internet access from both
> Linux and Windows 95. Check that the Windows 95 browsers can
> access the internet through the Linux modem.
Netatalk is also nice if you want to allow any Macintosh users LAN or
Internet to access your machine.
>
> 6. Recompile the kernel to include IP Forwarding, set up IPchains to
> protect the internet communication. Configure a Cron job to
> exchange email with the ISP machine using fetchmail to get the
> mail, with procmail filtering, and use sendmail -c to upload the
> waiting email.
If you have a 6.x version of Red Hat this is already supported in the kernel.
Using a modem I would suggest that you use Squid
http://www/squid.org. It is a good idea anyway.
>
>OK, what have I forgotten, overlooked, or missed?
>
>Yes I know this is a long list, but I think many people might not know
>what is involved in setting up this type of a system. The easier we
>make it, the more people will catch on to the real power of Linux.
>
>Help me get this right, and I will help spread the word.
>
>Thanks
>
>John Moore
>
>>>I am in the process of setting up a network in my home. I have a
>>>server running Redhat, and 2 clients running Win95. I would like to
>>>know if there is a document or book somewhere which would guide me?
>>>Or if not I am willing to create something since I am sure others
>>>would be interested in understanding how to accomplish this task.
>>>
>>>I know how to do some configuration of things like PPP, Sendmail,
>>>fetchmail, and some Samba. What I am unsure of is what other
>>>processes I might want to setup.
>>>
>>>I want the system to use a Linux as the mail server and relay the mail
>>>through my ISP. I would also like the Windows 95 boxes to use Linux
>>>as a gateway to the internet. I don't have a full time connection,
>>>just a modem which I have on a cron job for mail transfers. I start
>>>PPP manually when I want to go to the internet. I think I want to do
>>>IPChains but will need to learn how to configure this. I don't think
>>>I need a firewall, since it is only connected to the Net when someone
>>>is online.
>>>
>>>Please point me to information, or a discussion list about this type
> >>of setup.
>
>>To use Linux as a gateway:
>>
>>1). set up diald or the auto-connect of more recent PPP daemons. This
>> will connect on request for Linux or Win95 when set up.
>>
>>2). Add IP forwarding to your kernel and turn it on.
>>
>>3). Set up ipchains to act as a firewall. YOU NEED THIS! It can take
>> seconds to crack a box. The Win95 clients are very vulnerable if
>> you leave them exposed. You can wipe and crash a Win95 box in
>> under
>> a second - some websites even run a cracking script against you
>> when you browse them (rare but very nasty when you're bitten).
>>
>>Your Win95 machines should now be able to browse the net :-)
>>
>>For mail:
>>
>>1). Use Linux fetchmail to grab your mail from the server on connect
>> or run it periodically from crontab.
>>
>>2). Install POP3 or IMAP on the Linux box to act as a local
>> mailserver.
>> Make sure that you only allow relaying in sendmail from your local
>> LAN or the spammers will eat you for lunch.
>>
>
>
>
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