Re: Backup paths to the internet.

On Mon, Mar 9, 2009 at 12:42 PM, Kipton Moravec <kip@xxxxxxxxxx> wrote:

On Mon, 2009-03-09 at 16:18 +0100, Joep L. Blom wrote:
Kipton Moravec wrote:
I am planning to use a computer as a gateway/firewall running Ubuntu
(or
another version of Linux).

What is the utility, or service, I need to allow different paths to the
Internet through this gateway?

For example, the primary path to the Internet is through eth0 the first
Ethernet card in the computer. However if that gateway is down, then I
want it to use a second path (or a third if #2 is down also). I can
make
it another card (eth1), or another IP address on the first card.
Finally
if all else fails, I would want it to dial up (or use a serial port) to
establish a slow but functioning connection.

When the first path is active again it goes back to the original
configuration.

I want this to happen at the gateway computer, so the users do not see
anything, except for a reduction in performance if I go to a slower
connection.

What is this called, and what do I have to read up on?
It is more than just IP Tables right?

Kip
I would advise to use the LEAF firewall
http://leaf.sourceforge.net/

This a standalone distribution and very small. It fits (if you want it
lean) even on a floppy disk but there are distributions for using it
from an CD, USB-stick, etc.
The firewall software is shorewall and it is a real hardware firewall
using 2 ethernet cards and not the pseudo-firewalls as offered for
Windows. I use it for > 8 years and the only time I realise it's there
when we have had a power outage.
Success
Joep


I just looked at the Documentation.
http://leaf.sourceforge.net/doc/binstall.html

Last update 11 May 2003?

Can't you recommend something more current?

Kip


--


Kipton Moravec AE5IB .- . ..... .. -...
==============================================
Four Way Test
Is it the Truth?
Is it Fair to all concerned?
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Will it be Beneficial to all concerned?
- Herbert J Taylor (1932)




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I don't want to initiate any discussion, but the best firewall/router option
you may have is Pfsense.
http://www.pfsense.org
It allows you to use Multi-WAN with inbound/outbound load balancing and
failover.

Cheers.


--
"It is human nature to think wisely and act in an absurd fashion."

"Todo el desorden del mundo proviene de las profesiones mal o mediocremente
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