[CentOS] VNC server not reponding to external requests

[zGreenfelder]

On Mon, Feb 25, 2013 at 11:33 AM, Neil Aggarwal <neil at jammconsulting.com> wrote:
> Hello everyone:
>
> I tried following the instructions on this page to set up a VNC
> server:
> http://wiki.centos.org/HowTos/VNC-Server
>
> I can telnet to port 5901 from the machine itself:
> # telnet 127.0.0.1 5901
> Trying 127.0.0.1...
> Connected to 127.0.0.1.
> Escape character is '^]'.
> RFB 003.008
>
> But, when I try to connect to it from the outside world, I get a connection
> timeout.
>

so it listens on the localhost, but is it also listening on the other
(eth0,1,2...) interfaces?are there possibly outbound network ACLs from
your outside host?   is there a firewall rule (I think later you said
iptables is off, but there could well be others, speculating about
your network topology)?   what do you get when you use telnet from
$outside to $ip_you_really_intend_to_use 5901?  and if that's not an
option have you considered tunneling X over ssh and just using that?
-- 
Even the Magic 8 ball has an opinion on email clients: Outlook not so good.