3 Oct
2013
3 Oct
'13
2:12 a.m.
From:
Heikki Hannikainen <hessu(a)hes.iki.fi>
Date:
10/01/2013 10:01 PM
To:
AMPRNet working group <44net(a)hamradio.ucsd.edu>
I think I have found and fixed a problem which caused rip44d multicast
reception to mysteriously fail on some systems.
Interesting story. I thought it might be the reason for my battle with the multicast
socket
on the Raspberry Pi, and I have checked the setting of rp_filter on it, but when I do:
cat /proc/sys/net/ipv4/conf/*/rp_filter
I get:
0
0
0
0
0
0
So it looks like the rp_filter is off for all interfaces on this system.
It could be a good idea indeed to turn it on, although I have some DROP rules for
obviously spoofed traffic in my firewall, but that is not going to help solving the
multicast
problem.
Apparently there is more than one reason why it could fail... still have not found what
is
going wrong here.
Rob