[ILUG] Routing.

[Mark Kilmartin]

I'm still having the same problem packets arrive on one interface but
try to return on another interface(The default route)

The rp_filter option had been set to 1 I changed it to 0.

MArk




On Tue, 2002-01-15 at 16:16, Martin Feeney wrote:
> On Tue, 15 Jan 2002 15:10:18 Mark Kilmartin wrote:
> 
> > The only option which I can find in fwbuilder which may help with this
> > is Accept source route.
> > Can anybody explain what this option is and if it might help me.
> > 
> > Or can anybody suggest another solution.
> 
> echo "0" >/proc/sys/net/ipv4/conf/all/rp_filter
> 
> This will turn off reverse path filtering.  Substitute all with the 
> interface in question if you know which one the route is being dumped at.
> 
> rp_filter - BOOLEAN
>          1 - do source validation by reversed path, as specified in RFC1812
>              Recommended option for single homed hosts and stub network
>              routers. Could cause troubles for complicated (not loop free)
>              networks running a slow unreliable protocol (sort of RIP),
>              or using static routes.
> 
>          0 - No source validation.
> 
>          Default value is 0. Note that some distributions enable it
>          in startip scripts.
> 
> Debian sets this to "1" by default for added security.
> 
> Add the following to /etc/sysctl.conf:
> net/ipv4/conf/all/rp_filter=0
> 
> Martin.
> 
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