[jacorb-developer] DNS Query being madeduring Handshake even though I have disabled it in the configuration.

[Nick Cross]

Does this happen without SSL enabled? Do you have a test case?

Regards

Nick


On 23/05/13 14:54, Alka Nand wrote:
> Hi,
>
> I am using Jacorb 3.0. I saw that during SSL Handshake Jacorb is making a
> DNS query even when I have turned off the following configuration parameters
>
> # Use DNS names in IORs
> jacorb.dns.enable=off
> jacorb.dns.eager_resolve=off
>
> # Force the FQDN host name lookup. Turn off if exactly the given host
> # names (e.g. "short" names) should be used in IORs
> jacorb.dns.force_lookup=off
>
> The problem is if DNS is not setup corectly the DNS query takes 12 seconds
> to timeout and in the meanwhile the server closes the connection.
>
> My question is why is the DNS query being made even though I have DNS
> turned off?
>
> The sequence is
> Time 0  - Client sends a "syn" to Server
> Server responds with an "Syn Ack"
> Client sends an "ack" back
> Client then makes a DNS query to resolve the IP address - Standard Query -
> reverse IPAdd.in-addr.arpa
> 10 secs from time 0 the Server sends a Fin and closes the connection
> 12 seconds later the DNS Query times out
> Client then sends a "Client Helo" but the server has already closed the
> connection
> Alert
>
> Is there any other way of turning off DNS?
>
> Any response would be greatly appreciated.
>
> Thanks
> alka nand
> Tellabs
>