On Mon, 18 Nov 2002 13:11:51 -0800, Bruce Atherton <[EMAIL PROTECTED]> wrote: > > I'm trying to figure out a way to use a single open port on a firewall to > connect to one of several VNC servers. Something like this (apologies to > the proportional font crowd): > > -- VNC Server 1 > | > Client -> Internet -> Firewall -> SSH ---|- VNC Server 2 > port 22 Server | > -- VNC Server 3
This works perfectly well from M$Windows or UNIX (Linux). Lets assume the SSH server Internet address is ssh.server, and the VNC servers addresses (AS SEEN from the SSH server - not the client !!) are vnc1, vnc2 and vnc3. Also, let's assume that the vnc displays are vnc1:0 (listening on port 5900), vnc2:0, and vnc3:20 (==> port 5920). You should forward 3 DIFFERENT ports from the client (local) to the remote VNC servers. The easiest way is to have configuration file (i.e. ~/.ssh/config) for UNIX (or Cygwin), if you use putty (http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html) for the M$Windows than the definition is interactive. The relevant part of ~/.ssh/config is (line with # are comments): # select an easy to remember host name Host *vnc* # You can put the dotted IP instead of name HostName ssh.server # for VNC it is best to use ports 59XX LocalForward 5910 vnc1:5900 LocalForward 5911 vnc2:5900 LocalForward 5912 vnc3:5920 # other ports forward (example: telnet) LocalForward 23 login-srvr:23 User your-user-name You run the ssh like this: ssh [-v] vnc The -v is verbose (debug) flag, It will show you important information (especially if the connection fails). After the ssh is successful you use the vncviewr to view like this: vncviewr localhost:11 (to see vnc2, 10 for vnc1, 12 for vnc3). Of course you can forward other ports as well (e.g. 110 for pop, 23 for telnet, 25 for smtp, see above) I use configuration like this every day (I connect from a PC running XP/W98, using Cygwin's open ssh) for over 2 years now. I used it with my laptop around the world and it performed well even with dial-up. Ehud. -- Ehud Karni Tel: +972-3-7966-561 /"\ Mivtach - Simon Fax: +972-3-7966-667 \ / ASCII Ribbon Campaign Insurance agencies (USA) voice mail and X Against HTML Mail http://www.mvs.co.il FAX: 1-815-5509341 / \ mailto:[EMAIL PROTECTED] Better Safe Than Sorry _______________________________________________ VNC-List mailing list [EMAIL PROTECTED] http://www.realvnc.com/mailman/listinfo/vnc-list
