RE: auto ip configuration

[Unknown <netfilter-devel@demultiplexer.de>]

hi Gary,

i heard about DHCP, but a lot of people out there does not.
they haven't any idea of ip. They admins configured they computers
not to use dhcp but STATIC ip configuration.
In such a case it would be nice to have a feature like described below.

regards
jaroslaw

Am Mittwoch, den 22.06.2005, 13:55 -0700 schrieb Gary W. Smith:
> Longshot but I think that it's called DHCP.  Otherwise you would have to change something somewhere each time you plug up your laptop.
>  
> Gary
> 
> ________________________________
> 
> From: netfilter-devel-bounces@lists.netfilter.org on behalf of Unknown
> Sent: Wed 6/22/2005 1:53 PM
> To: nf-devel
> Subject: auto ip configuration
> 
> 
> 
> dear list,
> 
> you know about people, which have some static ip configuration on their
> notebooks. they would like to connect to a smart gateway
> without the need to change anything.
> 
> I would ask you whether this is possible to implement such a gateway
> using netfilter.
> 
> I alredy build a working example with some tools and scripting
> but it isn't really performant and it have a lot of "design errors".
> Simple speaking it is a farpd running box, where all incoming requests
> are logged through the bridging code. The Syslog output is piped
> into a script and the requested ip is assigned to the lan interface.
> Evil thing ;-)
> 
> I would preffer something like inverse SNAT/MASQUERADE.
> The difference would be, that:
>         it applys to PREROUTING
>         it does mapping from a big subnet (maybe 0/0) to a singe address or a
> range of addresses.
> 
> The farpd would point all clients to the gateway.
> Having rp_filter disabled all misconfigured packets incoming on a lan
> interface would be translated into a valid ip address.
> Then the usual routing would take place.
> The response packets would be back-natted into the clients idea of the
> gateway address.
> 
> Would please someone give me a pointer.
> Am I completly wrong with this?
> 
> regards
> jaroslaw
> 
> 
> 
>