Java realVNC Viewer via HTTP-Proxy possible?

[James Weatherall]

Petra,

VNC Free Edition cannot serve both the VNC and HTTP protocols on the same
port number - this feature is currently available only in the Enterprise and
Personal editions.

The VNC Viewer for Java requires that it be possible to make a *direct*
connection (i.e. not via a proxy) back to the server, on the specified RFB
port.  Support for HTTP "tunnelling" may be added in future but is not
currently supported.

Regards,

Wez @ RealVNC Ltd.


> -----Original Message-----
> From: vnc-list-admin "at" realvnc.com 
> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of bonvie "at" gmx.de
> Sent: 05 August 2005 09:25
> To: vnc-list "at" realvnc.com
> Subject: Java realVNC Viewer via HTTP-Proxy possible?
> 
> Hi everybody,
> we test currently the remote administration of our customer 
> PCs from our
> internal LAN and have still problems. Our security decided to 
> use only one
> port 5800 for both Java an native viewer. To be flexible we 
> decided to use
> first the Web-Interface of the realVNC Enterprise Version, 
> anyway with one
> port for java and native viewer we are able to change this anytime.
> The communication starts on our internal clients, goes to the 
> http-proxy and
> firewall to the internet. With dyndns we find the router, 
> that forwards the
> port 5800 and come to the realVNC Server to administrate the 
> customer PC.
> Our security is the opinion that there is no need to install 
> any firewall
> rule for this connection because of the HTTP-Proxy.
> 
> The current result is that we are able to connect to the 
> customer PC an see
> the Website with realVNC Viewer Enterprise Edition 4.1.7 and 
> load the Java
> applet. After entering the connection details we receive no 
> answer and get
> the following exception:
>        java.net.NoRouteToHostException: Operation timed out
> 	at java/net/PlainSocketImpl.socketConnect
> 	at java/net/PlainSocketImpl.doConnect
> 	at java/net/PlainSocketImpl.connectToAddress
> 	at java/net/PlainSocketImpl.connect
> 	at java/net/Socket.<init>
> 	at java/net/Socket.<init>
> 	at vncviewer/CConn.init
> 	at vncviewer/VNCViewer.run
> 	at java/lang/Thread.run
> 
> Means this that the realVNC Viewer is not able to use the 
> HTTP-Proxy and we
> need a additional firewall rule?
> Any suggestions what we can change not to be bound to the 
> firewall rule that
> our security currently doesn't want?
> 
> Thanks for help!
>  Petra
> 
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