[rabbitmq-discuss] newbie problem--'Error: unable to connect to node 'rabbit at rabbitmq-small02-dev': nodedown'

Thu Mar 15 22:59:00 GMT 2012

Hi John,

On 15/03/12 20:54, John Stoner wrote:
> OK, I don't think it's the firewall. 4369 is open to TCP (we tried
> adding UDP. Didn't help). Plus when I do a tcpdump, I see packets
> received on small01 on 'rabbitmqctl cluster rabbitmq-small01-dev'. 

The EPMD port is necessary but not sufficient. From the details provided
in your previous email you would have needed to open port 57641 also.
This is a random port. Do you see packets on this port in your network
trace?

I would suggest temporarily eliminating the firewall entirely for
debugging purposes. See the firewall section on the clustering page for
configuration details:

https://www.rabbitmq.com/clustering.html

-Emile