Dear Bernard,
I found the website http://www.die.net/doc/linux/man/man8/route.8.html
which told me to run the following command:
route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0
This is an obscure one documented so people know how to do it.
This sets all of the class D (multicast) IP routes to go via "eth0".
This is the correct normal configuration line with a multicasting
kernel.
I have run this command to no avail....
As soon as I stop my firewall it starts to work, yet from the
managment server I can access the XML stats for all nodes. Its very
frustrating :)
Many thanks for all your help,
Alex
On 20/09/05, Bernard Li <[EMAIL PROTECTED]> wrote:
> Hi Alex:
>
> For multicast, try adding static routes through that interface, otherwise it
> would default through eth0.
>
> Cheers,
>
> Bernard
>
> ________________________________
>
> From: [EMAIL PROTECTED] on behalf of Alex Davies
> Sent: Mon 19/09/2005 19:37
> To: ganglia-developers@lists.sourceforge.net
> Subject: [Ganglia-developers] Firewall troubles (multicasting with
> APF/IPTables)
>
>
>
> Hi,
>
> I have been trying to install ganglia on my 13-node cluster and had
> it all working wonderfully and was amazed how easilly until I
> restarted my firewall :)
>
> I use APF which sits on top of IPTables and as soon as I start it
> ganglia just stops communicating with the rest of the world.
>
> All IPs that are involved in the cluster are allowed to communicate on
> any port/protocol but there is something not right. I can "telnet ip
> 8649" from the master to the nodes and I get the XML data absolutly
> fine but for some reason the master just is not connecting.
>
> I am also completly confused about the whole multicasting thing - I
> dont think I want it but I tried to just use unicast to no avail.
>
> What I really want is either some hints on setting up unicast (with
> one "master" connecting to the 13 slaves every 20 seconds or so and
> downloading the XMl data), or instructions on IPTables rules for
> multicasting (I have tried adding
>
> iptables -A INPUT -d 224.0.0.0/4 -j ACCEPT
> iptables -A OUTPUT -d 224.0.0.0/4 -j ACCEPT
>
> which was the only suggestion I could find in the archive, to no avail).
>
> With many thanks,
>
> Alex Davies
>
>
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--
Alex Davies // http://www.davz.net
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