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From Rob Davies <>
Subject Re: Duplex Network Connector and Firewalls
Date Thu, 06 Aug 2009 10:28:14 GMT

On 6 Aug 2009, at 09:23, Eric-AWL wrote:

> Hi
> We developped a quite basic multicast gateway to be able to build  
> networks
> of brokers beyond local networks limits.
> I would want to use duplex network connectors to be able to contact a
> distant network of broker and be able to receive an answer. I don't  
> want to
> implement a local multicast network of brokers and ask the contacted  
> brokers
> to use a network connector on their side because I would want that  
> to be
> dynamic.
> 'It's an "unmarked" client that dynamically contact a group of  
> brokers and
> want to receive answers back'
> I don't know how the back connection is created in duplex mode, and  
> if a TCP
> port is used and I wonder how that could work if there are firewalls  
> between
> the two sides of the duplex network connector.
> If that can't work, is it possible to fix a TCP port and reference  
> it into
> the duplex configuration to indicate the remote broker the TCP  
> connection to
> use to send its answers back ?
> Regards
> Eric-AWL
> -- 
> View this message in context:
> Sent from the ActiveMQ - User mailing list archive at

When duplex is enabled - the single connection is used by the local  
and remote broker. So to get through firewalls - only the brokers  
outside the firewall should create the network connection - and mark  
it as duplex


Rob Davies
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