Cannot Get Connection -- Could a firewall be blocking it?
hal "at" thresholddigital.com
Fri Feb 10 16:24:08 2006
On Friday 10 February 2006 10:45, John Aldrich wrote:
> Hal Vaughan scribbled on :
> > I have a client who cannot connect to me using RealVNC (both client &
> > server on Linux). B We've tried this from his office and his
> > Father's office, nearby. B
> > I'm running vncviewer:
> > vncviewer -listen
> > on my system, with my firewall set to forward port 5500 to my
> > workstation, and it forwards port 80 to port 5500 on my workstation
> > as well (I leave these ports closed unless I'm working with a
> > client). B On his
> > system he's running
> > vncserver and it is using display :1, so he uses this command line:
> > vncconfig -display :1 -connect myname.dyndns.org
> > And we don't get any connection. When I run the same line
> > from inside my LAN,
> > so it connects by going through dyndns.org, it works. B When
> > my friend does it
> > from his office, nothing happens and he gets no connection. B I
> > figured his firewall may be blocking outbound connections, so I had
> > him try:
> > vncconfig -display :1 -connect myname.dyndns.org:80
> > to send the connection through port 80. B If he tries to read
> > a web page on my
> > address, I see it on my firewall logs, but when he tries this (trying
> > to connect to my vncviewer), I see nothing in the firewall logs.
> > Is there any way to make the connection look like an HTTP connection
> > (other than using port 80)?
> > Can anyone guess what is likely happening? Is it likely his firewall
> > is blocking the outgoing signal because it realizes it isn't an
> > HTTP connection?
> Hal, can anyone ELSE connect to your listening viewer? I'm wondering if you
> need to also have the standard ports open. Also, make sure your client has
> their ports 5500, 5800 and 5900 open as well.
> JohnYes, I have another client that has no trouble connecting to me.
Do you mean make sure they have those ports open on their system or firewall?
(We have no control over his firewall -- that's what we want to get around!)