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-   -   Administering your Windows Servers with N900 (https://talk.maemo.org/showthread.php?t=40716)

colnago 2010-01-15 17:46

Re: Administering your Windows Servers with N900
 
Quote:

Originally Posted by Laughingstok (Post 474497)
All my servers are in a bunker. Does that count? :)

Yeah, I must have missed something. The idea is sound though. Though I administer *nix boxes mostly and use VNC if I need a GUI. Perl scripts do a majority of my administration though. :D

Depends on "whose bunker"...there's a couple of people with personal bunkers in their backyards, waiting for "the big day".

:p

Either way, while the OP's idea is "nice to know", but there are just way too many issues to get into...for some situations. I had a good laugh though. Thoughts of SWAT teams with laser sights and 24hr coverage on FOX news were dancing through my head.

:D

Laughingstok 2010-01-15 17:49

Re: Administering your Windows Servers with N900
 
Quote:

Originally Posted by colnago (Post 474521)
Depends on "whose bunker"...there's a couple of people with personal bunkers in their backyards, waiting for "the big day".

:p

Either way, while the OP's idea is "nice to know", but there are just way too many issues to get into...for some situations. I had a good laugh though. Thoughts of SWAT teams with laser sights and 24hr coverage on FOX news were dancing through my head.

:D

A large companies bunker. :)

Bratag 2010-01-15 17:52

Re: Administering your Windows Servers with N900
 
While I might not agree with the technique - I do have to say thanks to OrangeBox for the howto. Its a vast improvement from the normal troll and in some circumstances may be a good solution for an individual etc.

Thanks OB

colnago 2010-01-15 17:56

Re: Administering your Windows Servers with N900
 
Quote:

Originally Posted by Laughingstok (Post 474527)
A large companies bunker. :)

Fair enough, and justifiable enough. I was attempting to "humorously" make the point that, "that dog ain't gonna hunt", anywhere there are decent security measures in place....bunker locations included, be it corporate or fed., but more so at fed. Especially when you're at a site, leaning up against a server rack, and you realize your hand is covering a label that reads, "NORAD".

OrangeBox 2010-01-15 18:18

Re: Administering your Windows Servers with N900
 
Quote:

Originally Posted by rewt (Post 474511)
Let's start with these points...
1. Opening RDP to the world, to administer from one remote device is a bad idea.

I disagree. This is how millions of Windows Servers are being administered around the world. When VPN is not an option, we usually lock down access for the source IP. This should work even for people who are on DSL at home since the IP does not change that often. Also username, password, domain name must be given.
Quote:

Originally Posted by rewt (Post 474511)
Let's start with these points...
2. Although RDP is encrypted, there is no verification of the server's identity by default - this makes it possible for man-in-the-middle attacks.

Yes, by default is the key here. I let you write up a tutorial for the certificates ;-) to prevent MIMs
Quote:

Originally Posted by rewt (Post 474511)
Let's start with these points...
3. AFAIK rdesktop doesn't support TLS, so enabling it to reduce the risk of a man-in-the-middle attack is not an option.

And the point here is?
Quote:

Originally Posted by rewt (Post 474511)
Let's start with these points...
4. VPN is good. Off the top of my head, OpenVPN and vpnc (Cisco compatible VPN client) are both available for Maemo, so there is no reason not to use it.

PPTP is by far the easiest VPN configuration. Hope Maemo will add support to it. OTOH most mainstream firewalls allow you to connect via IPSEC and SSL-VPN in addition to PPTP.

rewt 2010-01-15 20:29

Re: Administering your Windows Servers with N900
 
Quote:

Originally Posted by OrangeBox (Post 474585)
I disagree. This is how millions of Windows Servers are being administered around the world. When VPN is not an option, we usually lock down access for the source IP. This should work even for people who are on DSL at home since the IP does not change that often. Also username, password, domain name must be given.

By people not concerned about security - inexperienced admins, generally. It's trivial to configure a VPN using OpenVPN (free), or even MS Routing and Remote Access (free with MS Server OS). It's not unusual these days for most firewalls to include some sort of VPN functionality. There is no excuse for exposing potentially insecure services such as this to the world these days. Even Microsoft advises to open as few ports to the world as possible. You never know what the next vulnerability in RDP will be, and based on a quick look through old KB articles remote code executions and denial of service attacks aren't out of the realm of possibilities.

Quote:

Originally Posted by OrangeBox (Post 474585)
Yes, by default is the key here. I let you write up a tutorial for the certificates ;-) to prevent MIMs

Even if they were told to do so and how, it would currently break access using rdesktop.

Quote:

Originally Posted by OrangeBox (Post 474585)
And the point here is?

The only way to verify the identity of the remote server is using TLS. TLS is not supported by rdesktop, therefore there is no way to mitigate MITM attacks. Tunneling the traffic through a VPN greatly reduces the likelihood of a MITM attack, though, which is another reason I advise against access RDP without any other security mechanisms in place.

Quote:

Originally Posted by OrangeBox (Post 474585)
PPTP is by far the easiest VPN configuration. Hope Maemo will add support to it. OTOH most mainstream firewalls allow you to connect via IPSEC and SSL-VPN in addition to PPTP.

From what I can tell, MPPE support has not been built with the default Maemo kernel, so it'll take a bit of work to get a PPTP client up and running. Until then, there's nothing stopping you from using something else.


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