Hi Raphael, I was using a similar service in my organization for the purpose of web-based demos (no control of the pc from the remote host). I was able to setup VNC with a little bit of creative configuration to perform the similar function. With some modifications to what I have done you can get this to work with control of the remote pc as well.
Basically, I have a linux server acting as the connection point for the pcs. I start the Xvnc server on the linux host using the following command: # Xvnc -geometry 1024x768 -depth 16 -httpd /usr/local/vnc/classes -httpport 80 -alwaysshared & I then start the vncviewer in listen mode to use the virtual display created by Xvnc: # vncviewer -listen -shared -display :0 -viewonly -fullscreen -geometry 1024x768 -noauto -depth 16 & On the windows PC that I want to share, I start the VNC Server software and use the "Add Client Connection" option to connect to the listening vncviewer on the linux server (port 5500, this is the default). This displays the windows desktop on the virtual linux display that was setup. The viewing machine then uses (in my case) the Java viewer applet to access the virtual display on port 80. You can also use the VNC viewer software (windows or linux) to connect to this as well. I have access to the firewall so I can allow port 5500 through. If you don't have access to the firewall, you can easily modify the source (linux vncviewer) to change this default port (no configuration option to change it to a more common port as far as I can see). Here's how it works: Demo Machine --- connects to --> listening vncviewer on linux machine --> displays information on --> Xvnc Virtual Display <-- receives connection from -- windows/linux vncviewer or java viewer software. Hope this helps. Leonard Leblanc IT Manager Emerge - environmental information solutions Suite 305-250 McDermot Ave. Winnipeg MB R3B 0S5 phone: 204.772.7239 fax: 204.775.7946 email: [EMAIL PROTECTED] website: www.emergeknowledge.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Raphael Zulliger Sent: Monday, February 16, 2004 8:50 AM To: [EMAIL PROTECTED] Subject: customer support with VNC (both PC behind a firewall) hi! i recently used netviewer (http://www.netviewer.de). this is a very interesting product, that allows other users to access your pc and (if allowed) vice versa. also copying files to the "parnter" is rally easy. BUT the real clue is that this also works if both pc's are behind a firewall (at least with most firewalls it seams to work - netviewer writes that on their homepage)! I guess (i'm pretty sure) that both pc's communicate with the netviewer's server. both use the same "registration number" to enable the netviewer's server to know which partners belong to each other... i haven't sniffed the packets yet and therefore i don't know anything about the internals of how they (netviewer) are doing this. now my question: - is there any existing solution that could do something simillar (regarding to the firewall-problem) with VNC? (assuming that i have access to an internet server where some kind of software may be started) - does anyone know how this is done exactly (in details, so it would be a good starting point to programm such a server myself - or at least some keyword for the used technology/method). please also assume that both partners do NOT have access to their firewalls (so port-forwarding is not possible). the firewalls both allow the pc from the internal network to access the internet by port 80 (and doesn't do any wild content scanning to check if the data really is http). i'm happy about any hints! thanks in advance, raphael p.s. what i could imagine (but i think it's to easy to be the solution): a server-program that runs on an internet-server. this app listens on port 80 and allows both pc's to connect to it. because the client connect, they are allowed to pass the firewall... then the server-app just forwards the contents of all packets received from pc1 to pc2 and vice versa... _______________________________________________ VNC-List mailing list [EMAIL PROTECTED] To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list _______________________________________________ VNC-List mailing list [EMAIL PROTECTED] To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
