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Windows 7: W7 remote Web RDP through Office firewall

03 Aug 2009   #1
jimbo45

Linux CENTOS 7 / various Windows OS'es and servers
 
 
W7 remote Web RDP through Office firewall

Hi everyone
I'm trying to connect to a W7 Home computer server via RDP (Web version)

Normally it works fine but I'm stuck currently behind some I.T office firewall.

However I CAN access my home page on my IISserver so it looks as if I can use ports 80 and 443. I KNOW that port 3389 is blocked by the office firewall so I assume even using the web version of RDP I'll have to change the listening port on the remote computer (Home computer). That's not a problem but do I also have to tunnel anything -- I've looked at putty.exe but not being a network guru this stuff looks a bit frightening.

Cheers
jimbo


My System SpecsSystem Spec
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03 Aug 2009   #2
mikinho
Microsoft MVP

6x W2K8 R2 (x64), 6x W7 7600 (x64), 2x Gentoo (x64), 1x Ubuntu 9.04 (x64), 1x pfSense (FreeBSD)
 
 

What router do you have? If your router supports port mapping (most recent ones do) you can keep your same internal port number and just assign a different external port number.

For instance, I have it setup so that depending on the port number I use I can connect to one of 6 different systems at home w/o having to change the RDP port on each system.

Two alternatives:

1- Live Mesh. When you install the Live Mesh client you can optionally remote into the client using it's own hybrid RDP. It is built on pre-W7 RDP technology so it is not as nice but it does work through firewalls. I keep this on my non-server machines as a backup RDP and cloud file sync.

2- Change the port that RDP uses. You can do this via the below registry key. See How to change the listening port for Remote Desktop. Personally I don't like this method much as I have to remember what ports I use internally and when I rebiuld I need to reassign the port.

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TerminalServer\WinStations\RDP-Tcp\PortNumber

If you provide your router I can help setup mapping.
My System SpecsSystem Spec
03 Aug 2009   #3
jimbo45

Linux CENTOS 7 / various Windows OS'es and servers
 
 

Hi there
I don't think the problem is with my router -- for example when I'm in the hotel and on their WiFi system I can connect without any problem whatsoever -- both via RDP itself or via the Web interface.

It's only when I'm in this particular office -- RDP won't connect at all - port is blocked and when I use the Web version I get the initial screen but it still says "Cannot connect to remote computer".

So what's next.

I know how to re-map ports on my own router but it's the Office proxy / firewall that seems to be screwing me up.

Cheers
jimbo
My System SpecsSystem Spec
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03 Aug 2009   #4
mikinho
Microsoft MVP

6x W2K8 R2 (x64), 6x W7 7600 (x64), 2x Gentoo (x64), 1x Ubuntu 9.04 (x64), 1x pfSense (FreeBSD)
 
 

Quote   Quote: Originally Posted by jimbo45 View Post
Hi there
I don't think the problem is with my router -- for example when I'm in the hotel and on their WiFi system I can connect without any problem whatsoever -- both via RDP itself or via the Web interface.

It's only when I'm in this particular office -- RDP won't connect at all - port is blocked and when I use the Web version I get the initial screen but it still says "Cannot connect to remote computer".

So what's next.

I know how to re-map ports on my own router but it's the Office proxy / firewall that seems to be screwing me up.

Cheers
jimbo
I'm either not being clear or not thinking this out enough. I was suggesting that if your office firewall blocks rdp then why not remap a port they do not block to rdp.

i.e. If they do not block port 81 (HOSTS2 Name Server) then on your router redirect external port 81 to internal port 3389.

Just a thought.
My System SpecsSystem Spec
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 W7 remote Web RDP through Office firewall




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