[erlang-questions] SOLVED: Re: how to connect erlang nodes through an uncontrolled firewall

Ivan Uemlianin <>
Fri May 13 17:45:10 CEST 2011

Thanks All.  I should have just tried it: it worked without anything 
fancy once I'd got the ports set up on the remote end.

So, I now have appmon and pman listening to a VM running on a remote 
machine.  Very convenient and nice.

Best wishes


On 10/05/2011 21:45, Jachym Holecek wrote:
> # Ivan Uemlianin 2011-05-10:
>> I'd like to connect a couple of erlang nodes together, one "here", one
>> on a remote machine.  There are two firewalls in the way: one on the
>> remote machine, one local.
>> The remote firewall I can ask for ports to be opened.  I've read that
>> 4369 for epmd and one other port are required (the second can be
>> assigned at runtime using sth like
>>      erl  -name qweasd  -kernel inet_dist_listen_min 9001
>> inet_dist_listen_max 9001 [1]
>> The local firewall is fixed, in the sense that I don't think I can ask
>> for ports to be opened and so on (I'm in a shared office building with
>> provided internet access).
>> Is there anything I can do at this end to open a connection?  I can ssh
>> out the the remote machine.  Can I have the nodes connect over ssh?
> You can forward arbitrary ports via 'ssh -L ...' -- never tried that for
> Erlang distribution though, so just a pointer for experiment really. If
> you have sufficient control over the remote server, openvpn is another
> quite hassle-free option for you.
> HTH,
> 	-- Jachym

Ivan A. Uemlianin
Speech Technology Research and Development


     "Froh, froh! Wie seine Sonnen, seine Sonnen fliegen"
                      (Schiller, Beethoven)

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