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Can installing an FTP Server break the ability to RDP into a server?

Posted on 2009-12-16
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Last Modified: 2013-12-02
I have Windows Server 2003 R2 Standard with Remote Desktop connections enabled (and heavily used). Recently, I have installed a FTP server and added users in Active Directory. Since then, the RDP does not work consistently, and I have to physically restart the server to use both FTP and RDP. Are there any suggestions as to what the relationship is? I have checked the services, the configuration settings for both FTP server and RDP connections, and I have checked the Active Directory for mistakes in setting up the new users.  I don't know where else to look!
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Question by:Dano13
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by:Cláudio Rodrigues
ID: 26062456
There is really no relationship and this should work just fine. The problem is if you now have FTP and you have no traffic prioritization on your network, FTP traffic may use a LOT of bandwidth and that will hurt RDP, with freezes and dropouts happening. What are the symptoms?
Also can you limit somehow how much traffic FTP can use?

Cláudio Rodrigues
Citrix CTP
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by:Dano13
ID: 26063185
tsmvp,

I agree, there should not be any correlation between these, but it is the only thing that has changed on the server.  The symptoms are basically that the vpn will always connect, and the ftp connects fine as well, but it seems that after using the ftp, the rdp can sometimes just hang, and eventually comes back with the "Cannot connect to the remote computer" (attached screen shot of the error).  This is not always the case, but about 40% of the time it does occur.  As for limiting the traffic, I am not sure how to do that,  but the FTP is not used frequently.

nordp.JPG
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by:Cláudio Rodrigues
ID: 26063514
What if you bypass the VPN and go directly to the RDP port? Same thing?

Cláudio Rodrigues
Citrix CTP
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by:Dano13
ID: 26066019
How do I do that? Is there a security risk to doing so?
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Cláudio Rodrigues earned 2000 total points
ID: 26066298
You would need to change your firewall to allow port TCP 3389 from the external IP to the TS internal IP. If you have strong passwords for your accounts the risk is minimal. Plus you will do this for testing and not leaving it like that forever. As soon as your tests are done, simply close the port you just opened on the firewall.

Cláudio Rodrigues
Citrix CTP
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