Re: Opening, blocking and changing ports on RedHat

I was about to say SSH is a trusted service.

On Tue, Jan 4, 2011 at 1:13 PM, keith smith <klsmith2020@yahoo.com> wrote:

> Ok, Thanks! No GUI on these boxes. All CL.
>
> ------------------------
> Keith Smith
>
> --- On *Tue, 1/4/11, JD Austin <jd@twingeckos.com>* wrote:
>
>
> From: JD Austin <jd@twingeckos.com>
> Subject: Re: Opening, blocking and changing ports on RedHat
> To: "Main PLUG discussion list" <plug-discuss@lists.plug.phoenix.az.us>
> Date: Tuesday, January 4, 2011, 1:02 PM
>
>
> Yes however you can open the port from the GUI under
> system-> administration -> security level and firewall
> if you don't want to poke around on the command line.
> Likely the reason you don't have to open the special service for ssh is
> that sshd is a trusted service.
> JD
> On Tue, Jan 4, 2011 at 12:52, keith smith <klsmith2020@yahoo.com<http://mc/compose?to=klsmith2020@yahoo.com>
> > wrote:
>
>
>
> Hi,
>
> I'm working on several CentOS and one RHEL servers. I needed to open a
> port the other day so I did a search and the info I found lead me to believe
> the only way to open or close a port was via iptables. Is that the complete
> story?
>
> For example, if I want to open port 3306 for MySql I need two things? 1)
> The port needs to be listed in /etc/services (RedHat) and 2) the port needs
> to be opened via iptables.
>
> If I use a non-standard port (3306) I must add a line to the /etc/my.conf
> that defines the port such as "port=xxxx".
>
> Here is a twist. I set my SSHD to port 2200 but did not change
> /etc/services, which lists ici on port 2200 for both tcp and udp. I am able
> to shell in using port 2200. Why no conflict?
>
> Thank you for your insight.
>
>
>
> ------------------------
> Keith Smith
>
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