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• Network monitoring library, or objects, for a cloud

  - by Andrew Smith

  I am looking for library to support server / switch monitoring, to actually be able to check with the device if it's working OK. However this requires some sort of auto-detection and device support. Basically I need to automatically detect a new device, start monitoring it like CPU and PING. So how do I auto-detect the machine remotely, this is something I need library for. Rackspace has something like this - "Cloud Monitoring API". But is there anything opensource which can be used same way? The Nagios and others doesnt have such API, and the big and expensive systems are too big to handle in public cloud, so there must be some other network monitoring engine with API, which can add a new servers automatically and support user isolation for example so I dont see other servers except mine.

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• Share ADSL Internet connection between two computers 40 meters away (straight) from each other

  - by dario_ramos

  I have a box with a working ADSL Internet connection. About 40 meters away (straight), in another house, there is another, older box. There are two houses in between. Would there be some practical way to supply an Internet connection to the older box? The neighbors are ok with us installing cables and stuff. I'd say wifi would not be practical, since the houses in between would weaken the signal too much. And using Ethernet cables might require a switch or router in between, due to Ethernet distance limitations. Advice?

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• Text on Cisco ASA console is garbled/missing letters

  - by Some Linux Nerd

  I've actually looked up a number of solutions for this problem and none of them work. There's this Cisco ASA 5505 that I'd like to use, that outputs mildly garbled text with missing characters. I did some googling and found that the most likely problem is a bad baud rate, so I tried all the baud rates, 7N1, 8N2... basically every possibility minicom had. Then I figured (since I can type ok, just not read) that if I factory reset it that it would fix whatever is set wrong with the terminal. That didn't work either. This usb-db9 adapter and console cable work fine on the catalyst switch in our office. My serial settings are 9600 8N1 with no flow control. Anyone know how to fix this? I have an example of the text on pastebin: http://pastebin.com/MAJF0mVU - it's just lots of "Dfaut cnfiuraionfil cotais 1enty." instead of "Default configuration blah blah"

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• What are good and bad jitter times for a LAN

  - by garyb32234234

  Ive just ran jperf (frontend to iperf) on our network between 2 workstations, its recorded jitter between 0.033ms and 0.048ms. Is this good or bad? Are there more variables that i would need to consider to make the decision? EDIT: TCP/IP Ethernet LAN 43 PCs 1 server, 100Mbits main switch, various small 8 port switches, test was done using UDP, Its a Windows Domain. I want to instal a few voip softphones on the workstations, see how many i can use that reliably work, im testing a few different workstations around the network to see where the best quality network paths are. Will also change some equipment if i identify bad connections.

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• Distribute Nagios to reduce false alarms

  - by GDR

  I'm currently running a single Nagios instance. From time to time, I'm getting false alarms about timeouts - for example, it says that HTTP is down on some server, but when I open it in my browser several seconds later, it loads fast, and in general there is no trace of an error. What can I do to reduce such false alarms? I'm guessing that it's because of transient network issues on my monitoring server. I guess that setting up another monitoring server on a different network would greatly help, but how do I plug it into Nagios? Is it at all possible with Nagios or do I have to switch to another monitoring system? I like my configs and, if possible, I'd like to stay with Nagios or something compatible (Icinga?)

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• Warming up an IIS Application Pool automatically?

  - by Michael Stum

  So IIS likes to shut down app pools that aren't in use. While this makes sense, I would like to have certain app pools conterminously running, but I don't want to just disable the automatic app pool restart as some of the settings (e.g., maximum memory limit) are good to have. I know that Microsoft announced the IIS Application Warmup module as an IIS 7.5 feature only then to do a Bait & Switch and pull it again so that they can put it in IIS 8 instead, so I wonder if something exists to run on IIS 7.5/Windows 2008 R2?

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• How to make a quiet laptop ? [closed]

  - by psihodelia

  Most modern laptops have very noisy fans. I am looking for a quiet laptop or a small stationary computer which has all its hardware built in a display. Most tasks will be pdf/docs processing, real-time audio processing, web-surfing and skype video chats. Certainly, there is no any fan-less model today; but maybe some of the existed laptops do not switch on their fans so often or implement different solutions? For example, an iPad has no fan at all and it is fast enough for my needs, but it has no normal operating system, so I can't use it for anything but audio chats and web-surfing. Or maybe I can buy a laptop and tweak it to make it absolutely noiseless? Can you recommend me any solution please? Thanks in advance!

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• Service or software to auto-sync one server to another so they are identical?

  - by Ryan

  We have a main node in a DC data center and want to setup a back-up node in Seattle. The back-up node will only be used if the DC node goes down and we switch it over while DC node is repaired. The question is, what kind of services out there allow me to sync the data, I suppose we want to do it fairly frequently so if something goes down there isn't much loss in data between the time of failure and the last back-up/sync. Is there any common solution for this? It's Windows Server 2003 running Parallels Virtuozzo.

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• What are the essential considerations for setting up systems in a location with unreliable power?

  - by dunxd

  I deal with a lot of remote offices located in parts of the world where the local grid power supply is unreliable. Power can go off anytime with no warning, with outages ranging from minutes to days Power fluctuation is wild, with spikes and brown outs Currently the offices will have some or all of the following: A generator, with an inverter, or some sort of manual switch A big UPS or battery array connecting a number of devices Several smaller APC UPS with computers attached Low cost Voltage Regulators sometimes connected between mains and UPS or device. I know that each of these things needs to be appropriately rated for the equipment to which it is connected (although I am not sure how to calculate the correct rating). The offices will generally have the following equipment (in varying quantities): some sort of internet connection device (VSAT router, ADSL modem, WiMax router) Cisco ASA 5505 firewall a bunch of PCs printers one server I don't seek to replace the advice of an electrician, but in some of these locations they only answer the questions you ask them, so I need to make sure I have enough understanding of the essentials to protect equipment from damage, and possibly get through some power cuts.

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• Importing orphaned Outlook 2010 OST file

  - by BigBadJock

  I have a problem with Outlook 2010 and OST files. First my exhange hosting company deleted my exchange account by accident. They've created it on another server, but can't get the data back. Now I did make a copy of the \users\name\appdata\local\outlook directory. So I have the original OST files. I decided to switch hosts to Office 365. During this, I stupidly deleted my account from within outlook and recreated it to point to Office 365. And only then did I learn that you can't import from OST files. Edited to clarify: I have a complete backup of the pc. Which folders would I need to restore to ensure that I can get exhange back it's previous state? I'm prepared to to a complete restore if necessary, but would prefer to localise the changes.

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• Vim quit insert mode when navigate with mapping keys

  - by zdd

  In order to move the cursor in insert mode, I add the following key maps in my .vimrc(I use vim 7.3 on Sun OS) inoremap <Alt-h> <Left> inoremap <Alt-j> <Down> inoremap <Alt-k> <Up> inoremap <Alt-l> <Right> When I press the mapping keys, the cursor moves correct, but vim will quit insert mode and switch to normal mode, what's wrong with my vim? I also tried this with my gvim on Windows, it works well. Did I lost any options for the mapping keys?

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• Windows 7 Pro x64 suffering from insomnia

  - by gemisigo

  My Win 7 Pro x64 is unable to enter sleep mode. Pressing the sleep button results in strange state where the computer starts entering the sleep mode, the display is turned off but then the whole process stops, it does not switch off the hdd, the keyboard still responds to numlock/capslock, but the display does not on anymore. I have to cut power and restart. If I remove everything (wireless mouse, external hdd, usb hub, etc.) it does enter sleep mode, but if there is something left, it does not, though every one of them has "Allow the computer to turn off this device..." checked and "Allow this device to wake the computer" unchecked. Why does it not work? It was working properly in the RC.

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• Migrating Identity Providers - specifying a new users password hash.

  - by Stephen Denne

  We'd like to switch Identity Provider (and Web Access Manager), and also the user directory we use, but would like to do so without users needing to change their password. We currently have the SSHA of the passwords. I'm expecting to write code to perform the migration. I don't mind how complex the code has to be, rather my concern is whether such a migration is possible at all. MS Active Directory would be our preferred user store, but I believe that it can not have new users set up in it with a particular password hash. Is that correct? What user directory stores can be populated with users already set up with a SSHA password? What Identity Provider and Access Management products work with those stores?

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• consulting a network admin for rails and php applications

  - by Karo Devos

  Hi I'm a web developer who writes most of the time rails applications. Next month I'm going to switch from my current VPS to linode. I'm wondering how much it would cost to properly set (or teach me how to do it) everything to get my app up and running. My requirements are probably: nginx/apache, REE/ruby, passenger, full blown php environment, system wide RVM, search engine such a sphinx, being able to perform cronjobs. I have some knowledge of unix and I was able to install everything I needed on my development system. However I had quite a few issues setting up everything on my production server.

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• what's POST code 18 / can I run an ASRock P55 Pro + Core i3 530?

  - by Michael Borgwardt

  When I switch my newly built PC on, the fans start up, but I get nothing on the monitor, and the POST display on the motherboard runs quickly through various codes and then stops at code 18, which does not appear in the manual (the list there seems identical to this one). This lasts about 10 seconds, after which the machine shuts down. After a pause (also about 10 seconds) it starts up again, and this repeats until I cut the power. Interestingly, when I push the reset button, it stops at POST code 16 (which is also not listed in the manual). Does anyone have information about the meaning of those codes? Motherboard: ASRock P55 Pro CPU: Intel Core i3 530 Graphics Card: Sapphire HHD 5750 Does anyone have experience with that Motherboard/CPU combination? It says on the packaging and in the manual that it's only compatible with Core i5 and i7 (no mention of i3), but on the maker's product page, the i3 is listed as compatible as well.

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• MacBook Pro USB port provides more current in Mac OS X than in Windows

  - by AngryHacker

  I have a MacBook Pro with both Mac OS X Lion and Windows (under BootCamp) installed. While in Windows, I tried to charge my iPad 3 via the USB port. The iPad says "Not charging", but really, it does, just super slow (4-5% per hour). The reason for this is that the iPad requires 2.1 A of current, but a standard USB port provides 0.5 A. However, if I switch to Mac OS X, the iPad states that it is charging and it does at a rate of about 10% per hour. The only takeaway from this is that either OS X puts out more current on the USB port or that it recognizes the iPad and acts accordingly. Can someone provide more information on what is actually happening?

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• Can irssi ignore the 24h dsl-reconnect

  - by mcnesium

  A couple of weeks ago I had to switch my ISP from cable to DSL. Now I have this ridiculous disconnect and reconnect every 24h. It's no big deal insofar as having a new IP address every day, but for one exception. Since I host my irssi screen on a machine inside the LAN, my history gets affected by the reconnect in terms of a topic announcement, the users in each channel, creation date and so on. It's about 10 lines of redundant content every day. This is annoying especially in channels with very little traffic, because you hardly see the actual content in line with the every-day-junk. So I was wondering if I can tell irssi to silently ignore the reconnection details, so that my only meta-content in each channel goes back to "Day changed to ...", like back in the days of cable-internet.

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• If I don't want subdomains to send out email, do I need SPF records for them?

  - by Phil

  I have a main domain with (now) valid SPF record, but we also programmatically create lots and lots of subdomains for clients via cpanel PHPXML API. These subdomains are not intended to send any mail. When we create them, they are getting an A record of my ip, and a TXT record of "v=spf1 +a +mx +ip4:[MY IP] ?all". Those are all the DNS records they have Recently we have had a lot of email spoofing and realized there was an invalid (duplicate SPF) for our main domain. We just fixed that, but are unsure if: 1) Can spammers still spoof email from subdomains without MX records, with above current listed SPF? 2) Is it better to have no SPF for subdomains than the one I have listed? 3) Is there a way to prevent subdomains from sending/spoofing email via my main domain's SPF? Here is the main domain SPF that our host suggested we switch to: "v=spf1 a mx ptr a:dedrelay.[webhost].com include:dedrelay.[webhost].com ~all"

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• Can I save a session in Chrome?

  - by EmmyS

  Is there a way to save sessions in Chrome? I'm a longtime Firefox user, and am used to being able to save a session containing multiple tabs so I can go back to it at any time. I'm trying to switch over to Chrome, but without this ability it's not going to happen. I know that I can set the prefs to open the last-opened tabs at startup, but that's not really the same as true session management. I'm perfectly happy to install an extension to do this if one exists. (Not sure if this question belongs here or in superuser...)

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• How do I add a counter for process data in perfmon.exe for a process that isn't currently running?

  - by Jason Jones

  I would like to perform an ad hoc capture of data using perfmon.exe for a process that runs during the night. I know the name of the executable--lets call it Foo.exe. If the process were currently running, I would go to the Add Counters dialog in perfmon, switch to the Process object, and select the Foo instance from the list. However, it's not currently running. Is it possible to set up perfmon so that it will capture process data for this process when it starts, and if so, how would I configure it to do so?

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• Windows 7 strange boot issue

  - by JL

  Recently I installed an SSD drive, its now my primary boot drive (OCZ Vertex Turbo 60GB). I'm running Win 7 (64bit). Now I am not sure exactly where the fault lies, but when I do a restart from within Windows, the computer will boot and enter into the loading windows portion, however won't progress beyond there. My solution is to manually hit the reset switch, and then when it boots it enters into a windows menu that offers a start up repair or start windows normally. I select start windows normally, and then it boots fine. I am not entirely sure why I can't just restart the computer from windows normally though. The SSD drive works perfectly, and not even sure if it is the cause to this problem. Any ideas on this?

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• PS3 through line in?

  - by h20

  Hey all. I'm looking for a way to chat through LAN (via PC) while playing PS3. Would it be possible to run my PS3's sound through my desktop's "line in" and somehow (if possible) mixing it with my normal PC sound to produce one output that I could, say, use with headphones? I'll add that I'm currently running to line in (not mic) from the line out on my monitor (Flatron W2453V), where my PS3 is hooked up via HDMI. I tried running femalex2 to male 3.5mm splitter, but it dims my PC sound when PS3 sound is available. Chat would be impossible. Currently running Linux Mint if that's of any concern, but am willing to switch to any flavour of Linux to get this working

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• Monitor status while using VNC

  - by kumar

  So after connecting to a vnc server via vnc viewer to my desktop (remotely), Is it possible to know whether the monitor connected to the CPU is switched ON or not. Simply put, from command prompt how do you know whether monitor is ON/OFF from command line. Here, Basically I am bit worried about privacy as my monitor can be viewed by anyone while accessed remotely. Any solution? Obviously there is a option to switch off the monitor while starting the vnc server at remote side but I am looking for a better solution to control monitor(possible??) remotely. Thanks!

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• vim: sending tab-completion key against a mapped keystroke

  - by CDR

  To switch between buffers without installing any plugins, a good way is to type :b <tab> Which shows all the current buffers names in status bar and you can pick one using cursor keys and enter. But :b <tab> is 5 keystrokes and I would like to map it to a <leader>. But setting the following is not working. :nnoremap <Leader>. :b <Tab> It shows ":b ^I" in status bar and doesn't actually open the buffer names on status bar. Anyone knows why?

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• Mouse Hang with voltage fluctuation

  - by user265495

  I bought a new assembled PC about a month ago, but for the past 7 or 8 days I found my mouse cursor hangs every time there is a voltage fluctuation on my UPS (I guess it as when sound comes from ups then mouse hang for 2 or 3 sec. and them it goes normal again). My PC also seems to shut down while I'm working and it refuses to boot again - I end up needing to switch off my UPS and press and hold the power button for 30 seconds. It will then boot as per normal. Could the trouble be with my PSU? Am I potentially damaging my computer by pressing and holding the power button? I have : Motheboard : intel Chipset Model - DH61WWAAG23116-303 Processor : Intel Core i3 3.20 Ghz RAM : Zion 4 gb DDR3 HDD : 1 tb GRAPHICS : 2 gb NVIDIA GeForce GT-610 CABINET : Frontech Rock OS : Win 7 32 Bit

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