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Is having port 3389 open on my server 2012 RDP server risky

Posted on 2016-08-12
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Last Modified: 2016-08-22
Is having port 3389 open on my server 2012 RDP server risky
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Question by:dannyfccs
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6 Comments
 
LVL 34

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it_saige earned 2000 total points
ID: 41753991
The cold hard truth is that *any* open port is a potential security threat.  Internal, external; It does not matter, you are still allowing access to something via a communications port.  In most instances, the port is well-known, well-defined and in of itself, the communication poses little to no threat to system integrity.  In your case you are allowing access to the system in question via 3389, the default RDP port.  Now all a potential attacker needs to do is get past windows security.

In order to minimize the threat level, most admin's will do any (or all) of the following:

A.  Change the port.
B.  Provide a proxy to the port.
C.  Restrict access to the port (this can be accomplished in a multitude of ways; e.g. - targeted source/destination firewall rules).

-saige-
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LVL 96

Expert Comment

by:Lee W, MVP
ID: 41754210
I agree that any port open is risky.

You should not expose RDS to the internet.  Setup a VPN and allow your users to connect to that first.  Or an Remote Desktop Gateway server.  Exposing ANY port to the internet is risky for any reason and it's generally considered safer to allow access through VPN or RD Gateway instead of direct RDS.
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LVL 8

Expert Comment

by:Senior IT System Engineer
ID: 41754809
Yes it is.
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LVL 30

Expert Comment

by:serialband
ID: 41754893
Only if it's directly on the internet.  If it's only accessible within your secure, local network you should have no problems.
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Author Comment

by:dannyfccs
ID: 41766093
what alternatives would you use to RDP 3389 then?
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LVL 96

Expert Comment

by:Lee W, MVP
ID: 41766354
I'll repeat:
Setup a VPN and allow your users to connect to that first.  Or an Remote Desktop Gateway server
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