Re: ye olde 1521

I believe it very much depends on the platform and potentially some IP config parameters. It may also have changed over time with the advent of the internet and the need for firewalls. If every new connection requires a new - random - port # then there is a need to punch many holes into the firewall. I believe that at point Oracle adopted the option for all connections to use the same port.

Henry Poras wrote:

> Just wondering if one of my strongly held untested assumptions is wrong. I always thought that when you connected to Oracle via the listener in dedicated server mode, you would come in via the listener port (i.e. 1521, 1526). The listener would then validate, spawn off a shadow oracleSID process using some arbitrary port, and the client would then be passed to this process with the listener butting out at that point. The client would then be connected to the database through that arbitrary port.
> Last week a developer and myself checked this out. He sniffed the coming and going of packets, and everything used only port 1521. I looked at netstat (I think the parameters were asp (RedHat AS3 OS) but I'm not sure. That info is at work but I'm not at the moment) and the only active Oracle ports were also 1521. Are other ports used? Is this dependent on load? I searched metalink and found the question asked, but no answers were ever posted.
>
> Thanks.
>
> Henry
>
>
> --
> http://www.freelists.org/webpage/oracle-l
>

-- 
Regards

Wolfgang Breitling
Centrex Consulting Corporation
www.centrexcc.com
--
http://www.freelists.org/webpage/oracle-l