I have a remote computer behind a NAT running a VNC server. I cannot do a regular connection to the VNC server because of the NAT. Manually portforwarding the router is not an option. However, a reverse VNC connection from the remote computer while running VNCviewer on my local computer in listen mode would work. The problem, however, is telling the remote computer to intiate the reverse connection. The command that needs to run on the remote computer is:

c:\path_to_vnc\winvnc -connect my_ip_address

I was thinking of running an irc bot on the remote computer. That way, I could tell the remote computer to execute that command through irc. I tired searching for such an irc bot, but however, I end up getting malicious bots intended for harvesting computers for a bot network. Does anyone know of such an irc bot or does anyone have another solution or any suggestions?

I Have almost the same Scenareo @ my office , where my pc @ work is natted to outside. while my home PC ( Widnows XP ) has an External IP.

what i did is to Creat a VPN from the natted PC to the Home VPN Windows XP Proffessional VPN server.

in this case i can connect from the Home pc with the << VPN ip >> to the natted Internal Work PC with any service!!!

I have Remote Desktop , FTP Telnet and everything running only on the VPN IP.

Hope this helps.

tight vnc has the options your looking for built in

And what would those options be?
I am running ultravnc and I looked at the documentation for tightvnc and don't see much difference between the two. Care to elaborate?

Winvnc has a wonderful option command line switch called -connect which connect the server to the client.

Also , you could go for the better solution (IMHO) and create an ssh port tunnel, which would bring the remote vnc port to your machine, and you could connect to it locally. Do a search on "my meanest hack" on google, and you'll find a tutorial i once wrote about a similar situation.

From my original post:

The command that needs to run on the remote computer is:

c:\path_to_vnc\winvnc -connect my_ip_address



Yes, I was thinking the exact same thing. However, I couldn't find any windows ssh servers that I could install remotely. However, after doing a search on what you suggested, it is apparent that I can install cgywin ssh server. I will look more into that. Thanks for the help.

I saw something that was originally written for virusses (www.iamaphex.com i think it was on) however could be adapted to your needs. It worked something like the program connects to the non reverse connect RAT on the victims pc (both programs running on the victims pc) then connects to the attackers pc and then you connect the normal RAT client to the program running on the attackers pc.

ATTACKER > NORMAL CLIENT > PROGRAM < PROGRAM > NORMAL SERVER

It might be of some use I dont know and sorry I cant remember the exact name. If you cant find it or need it to work slightly differently tell me exactly how you want it to work and I will build you something.

Chris

If I understood you correctly, then what you said is essentially what ssh tunneling does. I am currentlly putting together a remote vnc and ssh server installer to achieve the ssh tunneling to get past NAT/firewalls.

i'm not sure if this is what u searching for but may be it could be usefull

Server/Viewer NAT2NAT connection without router modification:
http://216.55.178.47/index.php?section=21

sry 4 my bad english