Backup paths to the internet.

Kipton Moravec kip at
Mon Mar 9 18:42:55 UTC 2009

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
> 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.

Last update 11 May 2003?

Can't you recommend something more current?



Kipton Moravec AE5IB .- . ..... .. -... 
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