Re: Re: [LARTC] multipath routing problem [Shorter version] - Help

[Arthur van Leeuwen <arthurvl@sci.kun.nl>]

On Fri, 25 Oct 2002, Julian Anastasov wrote:

> 	Hello,

> On 25 Oct 2002, Vincent Jaussaud wrote:

> > But traffic is NAT-ed after multipath routing occurs !
> > Eg, the box which do multipath routing do not NAT traffic; traffic get
> > NAT-ed when leaving the gateways:
> >
> > LAN --> FW w/ multipath-routing
> > 	   |		|
> > 	  Gateway1  Gateway2
> > 	   | (NAT)	| (NAT)
> > 	   |		|
> > 	-------------------- Remote Network
> >
> > Packets reach the Remote Network using one of the Gateway NAT-ed IP, so
> > that when packets come back they should use the proper return path. Am I
> > wrong ?
>
> 	Now I see, then the TOS is a big problem for you. May
> be your problem will be solved if TOS is not a routing key but
> it does not sound as a thing that is easy to fix in kernel.

Actually, you can simply play whack-a-mole with the TOS value, using
ipchains (or iptables), killing all TOS values present on the packets.
Ofcourse, this is not very *nice*, but it'll work.

Doei, Arthur.

-- 
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