Re: [LARTC] installing automatic routes ?

["Roy" <roy@xxx.lt>]

Icmp redirect hardly could work because this feature is to dangeraous to
even enable.

ip route add (5) via (4) sounds abnormal, I suppose 4 is client, so how you
can route through yourself.

if you want to avoid router, then you need to make local resources to be
within client netmask address space.
or else they will be accessed through default gateway, which is that router.


----- Original Message ----- 
From: "raptor" <raptor@tvskat.net>
To: <lartc@mailman.ds9a.nl>
Sent: Monday, April 12, 2004 11:24 PM
Subject: [LARTC] installing automatic routes ?


> hi,
>
> I have this :
> <snip>
> .... several CMTS-cable-bridges(3).
> I have gateway a linux-router(2) (firewall/Shaper too), with eth0 pointing
to the
> CMTS-bridges..
> Things behind the ethernet interface of the cmts-bridges includes FTP,WEB,
DNS ets
> servers...
> on the cable side are thousands of modems and CPE's (computers...).
> Currently the network traffic always passes torught linux-router-eth0
interface 'cause
> all cable modems and CPE has it as a gateway device..
> (eth0 is aliased as ~10 interfaces with all classC nets gateways i.e.
eth0:1,eth0:2
> ....)
> That is why I have at least 10 class-C networks laying in one Ethernet
segment,
> but on the other hand they are logicaly (i.e. IP level) separated by the
gateway/s..
>
> I dont want to include separate machine as router, 'cause this will
complicate the
> the network.. and is yet another point of failure...
> ( I prefer flat-net, probably adding more linux-routers/bridges side by
side, but not one
> behind another)
>
> I also see something very interesting the traffic that passes from
cable-network to
> the FTP server for example goes trough linux-router, but then it returns
directly to
> the cable-net (for some unknown reson, probaly 'cause cmts-bridges are
apr-proxies!!!
> still wondering, any idea is welcome.. :'"') )
> instead of returning it back torught linux-router which is GOOD(tm) for me
:'"')..
>
> Finally what I want is upstream traffic to go directly to FTP server
instead torught
> linux-router-gateway.
> Pic :
>
>
> Internet(1) <-->linuxrouter(2) <---|---> cmts-bridges(3) <---> CATV
> (alot of net's)(4)
>                                                    ||
>                                                    ||
>                                local-resources(ftp,web,dns) (5)
>
> So the traffic at the moment is  :   4->3->(2)->5->3->4
> I want it to be : 4->3->5->3->4
>
>
> If I install route like this on some computer in (4) like this :
>
> ip route add (5) via (4)
>
> It works the way I want, but :'"') instead of doing it on every comp in
(4), I want
> to
> install it automaticaly, so I thought is there a way to insert some routes
!! in (5)
> (to return icmp-redirects, will this work) so that after several packets
(4) to adjust
> their
> tables automaticaly...
>
> If yes HOW !? if no is there other way to do it ?
>
> tia
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