Looking for Simple Instructions

[Roberto Nibali]

>>> On Director:
>>>   net.ipv4.conf.default.rp_filter = 1
>>
>> You should disable rp_filter.
> 
>     Done. I set the above line to 0 and re-ran "sysctl -p"

All rp_filter settings must be 0, setting the default to 0 has no impact 
on the running system. You must also set it to 0 for eth1 and/or all:

for i in /proc/sys/net/ipv4/conf/*/rp_filter; do
   echo "Setting 0 to $i";
   echo 0 > $i
done

Or I guess you add the relevant lines into your /etc/sysctl.conf.

>> Also check your kernel messages, e.g. the dropped packets from the 
>> reverse path filtering go there if log_martians is enabled.
> 
>     I enabled log_martians and I ran "tail -f /var/log/messages" and 
> "tail -f /var/log/dmesg" on all 3 machines while attempting another 
> telnet and nothing appeared in any of the 6 logs.

You've mentioned that ip_forward is 1 on the director, however I've just 
seen that in your output it's set to 0. So what's the case now? From 
what I remember though, it does not matter in kernels past 2.4. In 2.2 
and earlier days ip_forward had to be 1.

>> Ok, so packets are dropped at the director.
> 
>     Any ideas on why they are being dropped and not forwarded onto the 
> RS's?

I suspect rp_filter so far.

HTH,
Roberto Nibali, ratz
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