[CentOS] The moving of VNC port from 580n to 590n

[Cliff Pratt]

On Mon, Feb 4, 2013 at 10:20 AM, Robert Moskowitz <rgm at htt-consult.com> wrote:
> On my 'older' systems that include Centos 5.5 and Fedora 12, vncserver
> is running on ports 580n where n is defined by userid in the
> /etc/sysconfig/vncserver
>
> I just spent a bit of time getting it working on my new Centos 6.3
> server and found it listening on ports 590n.
>
> When did the change occur?
>
> And guess I should test out where it is on Fedora 17...
>
There's a lot of conflicting information on this topic on the
Internet. Most current VNC servers seem to listen on port 590n. I've
seen it claimed that a) port 580n is not used and can be blocked, b)
580n is used for the Java VNC client, c) 580n is used for browser
requests for VNC (probably via the Java VNC client, I'd guess).

I don't know when the change occurred and it may be that it happened
when RH changed from one VNC brand to another.

Cheers,

Cliff