Microsoft security administrators have always been a bit wary of publishing Terminal Servers to the Internet. And for good reason - there was no ability to pre-authenticate connections or use policy to determine which users could access which Terminal Servers. The lack of pre-authentication was an especially difficult problem.
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Without pre-authentication, anonymous users could leverage their anonymous connections to compromise the published Terminal Server. A compromised Terminal Server is perhaps the most dangerous exploit possible against your network, as the attacker has access to a full operating system to launch his attacks. Windows Server 2008 provides a solution to this security problem: Terminal Services Gateway. Using a Terminal Services Gateway, you can pre-authenticate users and control what Terminal Servers users can access based on credentials and policy.
This gives you the fine grained control you need to insure that you have a secure remote access RDP solution.In this two part series on how to put together a working Terminal Services Gateway solution, we will use the lab network you see in the figure below. The arrows show the flow of communications from the external RDP client to the Terminal Server.Figure 1Each of the servers in this scenario are running Windows Server 2008 Enterprise Edition. In this example network, I am using the Windows Server 2008 NAT server as my Internet gateway. You could use any other simple NAT device or packet filtering router, like a PIX, or even an advanced firewall like the Microsoft ISA Firewall. The key configuration option here is that you forward TCP port 443 connections to the Terminal Service Gateway computer.The has DNS, DHCP, Certificate Services in Enterprise CA mode, and WINS installed.The Terminal Server has only the base operating system installed. We will install other services during the course of this article series.The TS Gateway has only the base operating system installed.
We will install other services during the course of this article series.
What's New in Windows Server 2008 R2. 2 minutes to read.In this articleWindows Server 2008 R2 introduces the following new programming elements for Remote Desktop Services.
Terminal Services Is Now Remote Desktop ServicesTerminal Services has been renamed Remote Desktop Services. A server that has the Remote Desktop Session Host (RD Session Host) role service installed is now called an RD Session Host server, instead of a terminal server.Remote Desktop Virtualization APIThe Remote Desktop Virtualization API provides enumerations, interfaces, and structures that you can use to create custom plug-ins that override the standard redirection logic of Remote Desktop Connection Broker (RD Connection Broker).
Disclaimer: I need to point out that I am not sponsored by Passware in any way. However, this document does contain some affiliate links. Are you protected?‘Hmm, this is all well and good’, you might say, ‘But how do I prevent someone from breaking into my servers?’Over a decade ago the answer was always, ensure that your servers are physically secure. Now with out-of-band management options and virtualization, that attack platform has grown significantly. Physically UnfitFirst let’s cover the physical aspects.
Here are some common questions to ask yourself.Is your server in a locked room?I have seen a lot of servers left out in the middle of an office setting, under someone’s desk, or, tucked next to the cubicle plant. A dedicated space not only provides the adequate cooling and power, but also the necessary security. Hollywood often paints this picture that data is stolen through the firewall by some teenager wanting to play Global Thermonuclear War. Often overlooked is the disgruntled employee, or, some guy claiming to be from your I.T. So server rooms are important.Who can access the server room?A server room is only secure as its weakest point. There are a lot of server rooms out their that have been left unlocked. I have met them.An unlocked server room cannot be controlled.
So you need to find a way to control access. Traditional key locks are okay. But it doesn’t take much to get these duplicated at your local hardware store. Nor, does it give you any form of reporting as to who is using those keys.Key card systems are better as they are generally not easy to duplicate. Often the readers can report back whose card has been used and on what time or day. But cards can be lost or stolen.Biometrics are a better option as fingerprints cannot be forged (well except in spy movies).
I would hope that fingers and thumbs are not misplaced or stolen.Like any security mechanism, a multi-tiered approach can definitely help.How is the server room constructed?Biometrics might control your door access. But if your server room is constructed out of drywall, windows, or has a common drop ceiling or crawlspace with the rest of the office, that door access control might turn into an easy obstacle.Piggybacking might also be an issue.
This is where someone without access follows someone with access into the server room. At this point locked racks are the best option. Locked racks can also work in a shared office space where a dedicated room is not possible.
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A locked rack is a great deterrent.Are the servers locked? A lockable bezel is another great option. The plastic bezels seem like they could be broken. A server with a metal front plate is a bonus. But we need to see what that bezel prevents access to.A decade ago it was quite common place to see an opening on a server for a tape slot.
That is nice and convenient but it doesn’t lend itself to security. Many data breaches occur due to lost backup tapes.Hopefully, your server’s front panel covers up everything, including the power button, optical drive and USB ports. In my video I was using a CD to boot into WinKey. But they also have a USB stick option.
So, if I can force your server to restart and get a USB key plugged in, your server is hacked.That brings us to the rear of the server. Lots of USB ports back there. And pulling the power cord will force a reboot. The only real option at this point is a lockable back door on a rack.Is their local console access?If you have a KVM switch that requires password entry then that is just one more deterrent. Restricting access to the video and USB ports on the back of the server is a must though as technically a hacker could bypass your KVM. Out of (elastic) bandOut of band management has become quite prevalent as it has matured. Products such as HP iLO (Integrated Lights Out) and Dell RAC (Remote Access Controller) allows administrators to have remote access to a server as if they were sitting right next to the console.Administrators can power on the server, or, hard boot them.
Administrators can even mount virtual CDs/DVDs and remote boot the servers from an ISO image. This creates a whole new challenge as it basically extends the physical attack surface out onto the network.This opens a whole new set of questions.Are you using complex passwords?Hopefully, there is a policy already in your network for privileged accounts. You need to make your out-of-band access accounts contain as many characters as possible. It is likely you will only need to use these tools when troubleshooting an unresponsive server, or, performing remote deployment. So a password with 13+ characters shouldn’t be too cumbersome. Also, you need to make sure you are using a combination of uppers, lowers, numbers and special characters.Is access restricted?Sometimes a server comes with a shared out-of-band management port with a buy-up option to a dedicated port.
I would always recommend getting the dedicated port. This makes it easier to then plug that port into its own dedicated management network or VLAN. From their you can then control access onto that management network with access control lists. Virtual RealityAnother extension of the physical attack plane is virtualization. With more and more servers being virtualized this problem is only becoming more of a challenge.The big question here is:Who has access to your Hypervisor?If a user has access to your Hypervisor, then they can possibly power cycle servers, mount CDs and more.
When granting someone access to your virtual infrastructure, practice the rule of least privilege. Only give them the absolute minimum permissions required to perform their job. As mentioned already, complex passwords are important here once again. An expiration and lockout policy helps too.I hope this article has been of great help to you. These are the more common areas to lock down. As many of you know, the realm of I.T. Security is boundless. As always, would love to hear your feedback.
Especially on measures you have taken yourself to secure your servers.
I want to use Windows Server 2008 R2 Standard as a Terminal Server for my users. The Role of the server is Internet Browsing only as of now. This server will be setup in DMZ. I wil not be creating any NAT rule. It will be used by Internal company users. DMZ to LAN Traffic will be blocked. Kon boot 2.3 iso. LAN to DMZ will be allowed.DMZ has 172.0.0.0 IP ZONE X2LAN has 10.1.10.0 IP ZONE X1WAN ZONE X0How Application Virtulazation work in 2008 server?I like to have users clicking on Internet Explorer Icon on their Desktop and connecting it to Server but it should be transparent to them.
I don't want to the RDP Window to show up and that yellow bar sits on the TOP. What do i need to do? Please help me, or guide me to the material.Thanks.
Not sure why you're doing this with IE, but if you want to use Server 2008 to give programs to users without sending them to a whole Remote Desktop, you're asking about 'RemoteApp'.Long story short, any application installed on the Terminal Server can be delivered to users by making a custom RDP file that links back to the application on the TS.(Or you can put up a web page of program shortcuts, or you can provide a whole Remote Desktop. But that's not what you asked for.)Instead of a whole Remote Desktop, the application appears to the user as an individual window, like any other program.2 things to look out for:1) If you provide users with an RDP file instead of a webpage or desktop, it will appear as the standard 'satellite dish' RDP icon. Not sure how to change the appearance to IE, or keep users from confusing it with a locally installed IE.2) Since the application will not be running on the local PC, but will appear to be doing so, users can get confused. If they save something to 'Desktop', it will NOT be to their local desktop - it will be the desktop of the TS the app is being deployed from. Watch out for that kind of thing. Thanks alot, I am just done reading about RemoteApp and was searching for documentation Step by Step how to make a package file to install on User Desktop. We block 98% of Internet Traffic on your Network. Los trenes se van al purgatorio pdf.
This is a way to have users free ride, uncontroled envirmoent on Terminal server. If Terminal server is infected by malware, virus or Trojan, It will be isolate at TS. There will be no drives, printers or anything forwarding accept mouse, keyboard and screen.This server will be standalone connected with Firewall in DMZ.I am not sure how the Licenses will work? Do I need to buy user or device license.
Active Dir is not involved at all. All users will be local to Terminal server or I may just create a single user and have device license.What do you guys think?I appreciate all the HELP. Publishing a program with RemoteApp is very simple.
Windows Server 2008 R2 Terminal Server Cracked Key
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Open TS RemoteApp Manager, on the right click Add RemoteApp Programs, walk through the wizard. You'll have to manually go find iexplore.exe, as it's not in the normal list of programs to publish. After it's published, in the bottom of the manager you should ssee RemoteApp Programs, with your iexplore.exe in the list.
Right-click on that line and either Create.rdp file or Create Windows Installer Package. If you Create.rdp file, it will create a file in c:program filespackaged programs on that server - just copy that to the user's desktop. The Installer Package could be used to deploy it via Group Policy.
Restore Windows Server 2008 R2
Thanks for your ideas about Video over RDP. Users will not be using Videos extensively, It is mostly for browsing then audio/video.As, I am reading the documentation How to setup RemoteApp, I am confuse.The documentation says, To assign users to a RemoteApp program, The Remote Desktop session Host server on which the RemoteApp Program is configure must be a Member of an Active Directory Domain.To run the RemoteApp Program, a user must be a member of the Remote Desktop Users group on the RD session HOST server.This server is Standalone server connected directly to Firewall DMZ port, sits on different Network address. This server will have Local users only.What do I need to do in this case. I am going to finish all the reading and try it anyway. But I think I may have road blocks.Please help.Thanks.