Subject: Re: [Discussion@Acities] Agentcities, Jade and Firewalls
From: John Knottenbelt (jak97@doc.ic.ac.uk)
Date: Wed Oct 30 2002 - 10:09:10 MET
Hi Daniel
I don't know about JADE, but our platform solves this problem by using
an HTTP proxy for outgoing connections. Perhaps a similar thing is
possible?
Cheers
John
On Wed, 2002-10-30 at 07:28, Daniel.Rossier@swisscom.com wrote:
>
> Hi everyone,
>
> We are currently spending some time on configuring a machine
> hosting a ping agent in the Agentcities network using the Jade agent platform.
>
> As most industrial environments, there is a firewall behind our PC.
> Normally, as far as I understood, the inter-platform communication strictly
> relies on a HTTP MTP, that is available with Jade. We have therefore reserved and open
> an "in/out" TCP port (lets say 3000) for all agent interactions with agentcities
> (pingstat for instance). Although we are able to receive incoming requests from
> pingstat, no response is sent! And the reason is, that the Jade MTP seems to use
> a different port number for outgoing messages that is, the port corresponding to the HTTP MTP port
> assigned to the REMOTE platform; this has no sense!
> Normally, the outgoing messages should be transported on the same
> port (locally) that incoming messages, but addressed to the corresponding remote port (which obviously
> can be different) as it appears in the address section of the APDescription.
> Consequently, it is absolutely not possible to configure a firewall properly to work with
> Agentcities using Jade.
>
> My questions:
> 1) Why the MTP HTTP uses different port number for outgoing messages (and also,
> by the way for subsequent incoming packets probably because of the HTTP protocol) than for
> incoming messages? Can the issue be solved?
> 2) Is it the same thing with other agent platforms (FIPA-OS, Comtec, Zeus, etc.)?
>
> Many many thanks for all information about that.
>
> Kind regards,
>
> Daniel
>
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> Daniel Rossier
> Swisscom Innovations Ltd
> Ostermundigenstrasse 93
> 3050 Bern
> * Email: daniel.rossier@swisscom.com
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>
>
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