[Olsr-dev] Asymmetric ipip not working

Sven-Ola Tuecke (spam-protected)
Mon Apr 26 08:43:09 CEST 2010


ok - that's the critical one, and a bug in the olsrd code too. The 
olsrd-smartgw-server sets the rp_filter for the olsr interface and for all. 
But not for the tunl0 interface. The olsrd-smartgw-client is correct: only 
rp_filter on the olsr interface is needed.

Also, ping debugging may give you false positives here: when using NAT on the 
outgoing iface, conntrack stores the destination address somehow. Means: 
setting rp_filter back to 1 has no effect for an address you pinged recently. 
You need an unused ping target to verify the correct ip_filter setup.

// Sven-Ola

Am Sonntag 25 April 2010 18:06:46 schrieb Markus Kittenberger:
> afair its not necessary to set rp_filter on all or the wireless or lan
> interfaces
> but u must turn it off on the tun0 interface,.
> but check with the olsrd code,..
> Markus

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