[teiid-users] Teiid host resolution change after the M3

[Van Halbert]

Regarding the firewall issue:

http://community.jboss.org/wiki/UsingJBossBehindAFirewall

snippet:

Then, on the system behind the firewall, the following parameters need to be added to the java command line in the run.sh script to pass back the "correct" RMI information to the system outside of the firewall. 

 "Correct" in this case means the hostname that the outside system refers to when addressing the system behind the firewall.

 
    -Djava.rmi.server.hostname=<external_host_name>
    -Djava.rmi.server.useLocalHostname=true


It looks like  java.rmi.server.hostname property provided what the MMx firewall address provided.


On Apr 19, 2010, at 9:16 AM, Ramesh Reddy wrote:

> On Mon, 2010-04-19 at 10:24 -0400, Ken Johnson wrote:
>> So by default, the server will not be able to accept remote JDBC 
>> connections?  I see the security benefits of this behavior but also 
>> end-user inconvenience.  
> Yes, I agree that this is little inconvenience to the users out of the
> box. The primary driving factors were
> 
> 1) Security
> 2) Align the host resolution to be similar to the JBoss AS, so that
> users are not given two different choices in configuring the bind
> address.
> 
> The logic changed *if* the host name resolves "localhost" (mostly
> developer machines), however like in any typical shared server
> environment would have their host name specified, so they will resolve
> to proper LAN address that will be reachable by the known name. 
> 
>> Does the hostname or IP specified with -b have 
>> to match *exactly* with the hostname string in the JDBC URL used by 
>> client applications?  Or will it work as long as it resolves down to
>> the 
>> same IP address (I assume the latter but just checking)?
>> 
> If they resolve to same IP that would be enough. If the sever is started
> with "0.0.0.0" then any resolved IP on that machine will be fine. Also,
> note that user could still provide the host name/ip in the Teiid
> configuration to override the default behavior.
> 
>> Also, how will this impact Teiid firewall configuration and dynamic
>> IP 
>> environments like Amazon EC2 where internal and external addresses
>> differ? 
> I do not know. Do these offer IP forwarding services may be?
> 
> Ramesh..
> 
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Van Halbert
Principal Software Eng.
Red Hat, Inc.
------
vhalbert at redhat.com





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