Re: [TCLUG:15092] Linux & Cable Modems

[Bradley Wendelboe <krakken@mn.mediaone.net>]

You can setup all this with just one static IP.  Use Linux as the router
and assign private IPs behind it.  Use the Linux box to provide IP
Masquerading (NAT).  As for the NT web server, you can port-forward any
http request on port 80 of your Linux box to the IP/port of your NT box
inside your network.  You do not have to pay for addtional IPs and you
get a bit more security too (more if you really tighten up the
firewall).  My setup at home uses Mediaone for cable wich feeds into my
Linux box.  It acts as the router/firewall for my network.  Inside the
network I have a Linux Samba/FTP/WWW/DHCP server, and a few Windows
boxes for clients.

How-Tos:
http://www.linuxdoc.org/HOWTO/mini/Home-Network-mini-HOWTO.html
http://www.linuxdoc.org/HOWTO/IP-Masquerade-HOWTO.html
http://www.linuxdoc.org/HOWTO/IPCHAINS-HOWTO.html
http://www.ox.compsoc.org.uk/~steve/portfw-2.2.html

If you have any more questions, please feel free to mail.

Have fun,

Krakken

"McNitt, Jennifer" wrote:
> 
> Still haven't figured out the routing problem yet at home but I do have
> another question.
> 
> My husband has a cable modem and we were thinking about getting rid of our
> dedicated modem line and just use the cable modem for Internet connectivity
> for all of our workstations.
> 
> I just gave Charter Pipline (who we have service through) and they said that
> they now offer additional IPs.
> 
> Does anyone here have experience setting up something like the following:
> 
> Cable Modem connected to Router (linux box or maybe something else?) - 1
> static IP
> NT Server for WWW server - 1 static IP
> 2 Win 98 machines - DHCP maybe..trying to limit the amount of IPs we would
> have to buy
> 
> Are their any how-tos, etc. on how to setup something like this?
> 
> I also would like to get away from using the Linux box as a router if
> possible.  I have had too many problems with it and would just like to have
> the box to play with instead.  Does anyone have any experience with the new
> Linksys EtherFast Cable/DSL router? More info about this can be seen at:
> http://www.linksys.com/scripts/features.asp?part=BEFSR41
> 
> Thanks!
> 
> Jen McNitt
> 
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