Re: [akka-user] SSH Tunneling and Akka remote

['Michal Borowiecki' via Akka User List]

I've not tried that, but it reminded me of something in the docs that says:
*Important*: Using setups involving Network Address Translation, Load 
Balancers or Docker containers violates assumption 1, unless 
additional steps are taken in the network configuration to allow 
symmetric communication between involved systems. In such situations 
Akka can be configured to bind to a different network address than the 
one used for establishing connections between Akka nodes. SeeAkka 
behind NAT or in a Docker container 
<http://doc.akka.io/docs/akka/2.5.1/scala/remoting.html#remote-configuration-nat>.

I think SSH tunnelling counts as NAT, so Akka behind NAT or in a Docker 
container 
<http://doc.akka.io/docs/akka/2.5.1/scala/remoting.html#remote-configuration-nat> 
section should give you the answers.

Please let me know if that helped.

Cheers,

Michal


On 02/05/17 22:58, Evan Chan wrote:
Hi guys,

I have a host which is Akka 2.3.15 (yes I know that's ancient, but 
can't help it for now) running Akka cluster.
Now I have a remote client connecting to it, using 
system.actorSelection(.....).

The client can connect from the host that the server is running on, no 
problem -- if I use the exact hostname that the server was started 
with in the akka remote TCP config.

Now, I wish to use ssh tunneling to connect to the server.  This does 
not appear to work.   I get errors like:

[2017-05-02 14:19:30,560] ERROR akka.remote.EndpointWriter [] 
[akka.tcp://filo-standal...@xx.yy.65.65:2552/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2Ffilo-cli%40192.168.1.108%3A60669-0/endpointWriter] 
- dropping message [class akka.actor.ActorSelectionMessage] for 
non-local recipient 
[Actor[akka.tcp://filo-standalone@localhost:1235/]] arriving at 
[akka.tcp://filo-standalone@localhost:1235] inbound addresses are 
[akka.tcp://filo-standal...@xx.yy.65.65:2552]


Basically xx.yy.65.65 is the local server IP address and also the 
address the server is set to for Akka config.
"localhost" 1235 is the SSH tunnel address and port which forwards to 
the server and real Akka port (2552).

Any configs to get SSH tunneling to work?

thanks,
Evan

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