I’ve got to say, one of the things I really like about linux are the myriad of options for remotely administering a system. SSH is the one I use the most, but for the graphical you have x (especially on the LAN), nxserver (which is a compressed and optionally encrypted wrapper of the X protocol….), vnc can be used, although as I’ve noted in the prior articles one problem with either nxserver, X or vnc is that you can’t by default connect to a running X session. x0rfbserver CAN, but only if a user is logged in (as far as I know….) I found an interesting trick with x11vnc that let’s you run it even if the system is at the greeter. (the login screen for X).
Tag: support
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x11vnc recompiled to be as widely compatible as possible…
As I said in the earlier posts, I was essentially looking for a “Single click” solution for linux VNC remote desktop support. A solution that doesn’t require the remote support client to change firewall settings, install software, etc. What I’ve settled on is closer to a single cut and paste solution, which is fairly simple. The next problem I had was compatibility of the x11vnc binary. The first problem was the xfixes library not being a part of Mandrake 10.0, then xdamage, xrender, xrandr – none of those libraries were found… so, I started looking at the compile options for x11vnc (and the optimization, because I wanted a smaller file size.)
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Remote Tech Support with x11vnc and wrapper script
So, the idea is that I wanted something “like” the Ultranvnc Single Click download, only for linux. The main idea being is that if someone is looking for a bit of desktop tech support on linux, we don’t need to be giving instructions for 5 different package managers, or source compilation, or anything more than MAYBE something to cut and paste. In fact, something like this…. wget http://www.mysite.com/remote-support && sh remote-support could be easily pasted into a console window (which hopefully we can give instructions on finding), or a run command in kde for instance. Then the remote-support script should do the rest. *(By the way, the script doesn’t have to be chmod’ed to executable when we use sh to invoke it…)
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Remote Tech Support using VNC (Ultravnc SC and x11vnc+wrapper script)
Ok, some time back I’d done a writeup on UltraVNC SC, which is a nice customizable (windows version) VNC server that essentially let’s someone doing remote support build their own downloadable .exe that runs and automatically tries to make a direct connection to a “listening” vnc viewer. It’s good for helpdesk environments as an easy download and run, and I’ve done some trials at using it over the internet with some of my existing computer service customers. Very soon, I’ll be adding a page and information about Remote Tech support services using this same method. I have run into some problems with it though. There are multiple advantages to this approach though (the main being NO firewall config for the user needing remote support – all firewall config is done at the “support center” end. Another advantage being that it’s “hardcoded” to connect to a specific given address and if that fails it gives up and uninstalls itself. The last advantage being that it completely uninstalls after a successful session as well. (Well, technically it never “installs” to begin with.))
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Circuit City Support forum serving up trojan….
Embarrasing…. and a big pain in the neck for any of their visitors… It seems as though if you’ve visited Circuit City’s Support Forum with an unpatched Internet Explorer, you likely have a trojan/backdoor of some sort on your pc. (Assuming Explorer hasn’t been patched since January. In reality – if you haven’t updated explorer since then, there are likely SEVERAL backdoors. Call someone to work on it….)
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Mandriva Kiosk
Some time back I had seen a quick reference to Mandriva Kiosk as some new Mandriva version of the “Click and Run” repository of Linspire. I finally got a chance to give it a try with the upgrade of KDE to 3.5.2 (Mandriva 2006 had shipped with the 3.4.x series of KDE.) Anyway, I found the process to make it work fairly straightforward. I installed the 4 required packages (new versions could only be found on the kiosk webpage – none of the urpmi sources, even updates new about the newest version of mdkonline, or urpmi/gurpmi…) Once those were done and konqueror restarted, I gave a click at installing kde 3.5.2 and off it went.
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Google Picasa for Linux
One of the big stories out today… Google has released an “early beta” version of Picasa for linux. I first saw the news from the ZDNet Googling Google blog. There are deb, rpm and bin downloads available. The Official Google blog gives a few more details, for instance… this “magic” is made possible by a “carefully tested version of wine”. Also, they solicit feedback in the Google Labs Picasa for Linux group. I think this is very good news for linux users.
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Another trackback spam storm overnight….
All of the the swarms of trackback spam seemed to last an hour give or take a few minutes, so it does look kind of like “rent-a-bot” activity, lots of different IP addresses, trackback spam sites seem to have a common theme – the last batch was insurance type sites…. a sampling of about three or four found that they were all cloaked redirects for the same site/page …. http://www.finance-portal-online.com/insurance.php ALL are registered with moniker.com and all the insurance related domains being spammed (that I checked) redirect to the finance-portal-online.com site above which is registered to a “Bill Bilton” whose email is given as bill at top-support.net ….
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Google Calendar revisited
When Google Calendar first rolled out, I took a look and was not overwhelmed. Now, I’ve had a chance to revisit and see a few improvements. First, one of my initial problems was that I couldn’t get to calendar from gmail. The code has now been added in the upper left corner to navigate between the two (or the google homepage, or their “other services”). This was missing when I first looked. I distinctly remember seeing it in one of the testing screenshots. Even immediately after I had started out with the Calendar, the link was still not there. I’m not sure when, but it’s there now. Good.
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BIOS based rootkits coming soon….
There have been a couple stories out of the “Blackhat federal” conference in the last couple days. Brian Krebs at the Security Fix gives a good overview. One of the more troubling notes is the possibility of creating a rootkit that can hide itself in a systems BIOS. Security Focus has some detail on this as well.