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Remote Desktop through one subnet to another?

I'm not really sure of the right terminolgy to explain our configuration, but here goes:

We've got our own small departmental network with our own domain controller, subnet and firewall.  We get our internet access through our company's internet IP.  For example, when we do a whatismyip we get the same IP address as the rest of the company.  Our internet works fine.

We'd like to Remote Desktop into one of our computers from home, but when we try it, we're directed to the *Company's* domain, and the RDP login screen doesn't give us the option to key in our own domain.  I'm assuming that others in our company (maybe just the IT admin) connect to THEIR computers using RDP and that's why, on the RDP login screen, it's defaulting to the Company's domain name instead of ours.

Is there a way to bypass/go through that RDP "host" and get straight through to OUR computer with RDP listening?  Is there a way to use an address like:  12.34.56.78:192.168.1.105 to get to ours?  (I've tried that, and it doesn't work.)

Would VNC work, or would we get the same results?
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K A
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K A
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LightwaveMgmtCommented:
VNC or RDP would work.  VNC is probably easier and use a non standard port.  the main company firewall needs to be configured to send the traffic on that port to your departments firewall.  That firewall in turn needs to be configured to send traffic to the machine you want to access.  I hope that helps.
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K AAuthor Commented:
It helps, sort of... Your solution involves going to the Company's IT admin to configure his firewall, and we just don't think that's going to fly, so we eliminated that from our possible soutions.

So, leaving that solution aside... is there a way to use a port that IS ALREADY open (like port 80?  443?) that wouldn't introduce an undue amount of risk?  We can configure our own firewall any way we like...
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LightwaveMgmtCommented:
its going to be difficult to use one of those tools if you can not modify the first firewall.  You can try using logmein.com to remotely access machines.  If all you need is remote access, you can use their free version and no firewall modifications are needed.
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K AAuthor Commented:
Thank you for your reply, and I apologize for the delayed response.
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