Re: route (is it forwarding packets?) (sorry if duplicate).

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On Wed, 2004-08-25 at 11:07, Les Mikesell wrote:
> On Wed, 2004-08-25 at 11:03, Scot L. Harris wrote:
> > I understand the concept, but have not heard of anyone, not even a
> > rumor, that anyone has ever made use of such a service.  You are correct
> > about wanting Internet access and having a router that doles out the
> > DHCP is pretty much the default.  
> > 
> > If anyone has used this or even knows the brother of a friend who may
> > have used it once let us know.  I personally think this one was dead
> > before arrival.
> 
> I agree.  The internet works because responsibilities are delegated
> in a precise, hierarchical manner and wouldn't have a chance if
> every machine guessed at an address that might work.  And if anyone
> is listening that might fix this, please also add a straightforward
> way to control the source address used for outbound connections when
> a machine is given multiple addresses on the same subnet for virtual
> hosting.
> 
> ---
>   Les Mikesell
>    les@xxxxxxxxxxxxxxxx
> 

if your system has several IP addresses added as aliases on a single
interface/subnet, the routing table will provide the 'source' addresses
for outgoing communications.

if for example you have 4 IP addresses assigned as follows
   eth0      192.168.2.1
   eth0:1    192.168.2.2
   eth0:2    192.168.2.3
   eth0:3    192.168.2.4

Then the routing table will work as:

192.168.2.0     *     255.255.255.0   U     0      0        0 eth0
   the source will be 192.168.2.1
192.168.2.0     *     255.255.255.0   U     0      0        0 eth0:1
   the source will be 192.168.2.2
192.168.2.0     *     255.255.255.0   U     0      0        0 eth0:2
   the source will be 192.168.2.3

etc.




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