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• what kind of memory can be categorized as Modified Memory in Resource Monitor

  - by Kavin

  In Windows 7 and Windows 2008 R2, there is a new Resource Monitor that is very useful and powerful to monitor the system. In the Memory section, I see a section called Modified (orange) The official description is: Memory whose contents must be to disk before it can be used for another purpose. But I am still confused. What kinds of memory is Modified? In which case can we say that this number of memory is Modified? Can anyone give me a specific example? Is the following guess correct? When a program want to write something into disk, it actually write the content to an IO buffer, which is in the memory. After OS flush this area of memory into disk, the memory is modified or standby?

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• Wireless technology - which is better: more single radio APs or less dual radio APs?

  - by gert_78

  We are currently talking to vendors of wireless solutions for a wireless deployment in a university campus with some 5000 students. One vendor is offering us a Cisco solution with a WLC 5508 controller and 69 2x2 MIMO Dual-band/Dual radio APs (Aironet AP 1042 model) The other vendor is offering us an Aruba solution with a 3600 controller and 96 2x2 MIMO dual band BUT single radio APs (Aruba AP93) Both vendors are charging 82.000 US$ (support, 3y service contracts, switches and additional required options all included of course) The Aruba vendor is trying to convince me that 96 single radio APs will give us more connection/users/capacity then the 69 dual radio APs. I have my doubts about that and since it is my core competence-domain I wanted to ask here the opinion of people that have a more profound knowledge and experience in this area. When you talk to vendors it's often hard to get objective information. So try to answer only if you are sure and please mention it if you are affiliated with one of the vendors. I appreciate all useful help and want to thank you in advance for the effort!

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• Web and email host migration - Limitations and suggestions to make the process as easy as possible.

  - by Jack Hickerson

  I developed a website for a friend of mine to replace his current 'all inclusive' provider (website creation, updating, web hosting, email hosting). I've already paid for a hosting service which currently houses the website which I have created. I need to cancel the previous service provider to get the domain migrated to the new host, however I will still need to transfer or recreate all of the email addresses that everyone in his company had previously. Is there an easy way migrate email accounts (still linked to the same domain) while migrating to a different host? Will any methods allow all users to retain their archived emails and folder structures? What is the process to do so. Because the current provider is a rather large website development and hosting company, I will have limited access to the data they have stored. As you can probably tell, my knowledge in this area is very limited - any/all suggestions you may have would be greatly appreciated. Thanks in advance. -Jack

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• data replication from a production web server back to the staging web server

  - by Dennis Smith

  Have two web servers, development/staging and production. Code and some documentation is moved from the staging area to production either through on-demand jobs or nightly via a global replication job. The production server of course sits isolated in a DMZ. There is some content that gets uploaded to the live server that needs to be replicated back to staging. Our security team is locking the network down (and they should) and restricting access to the live server. Best suggestions for replication of "live" data back to "stage" and backing up the live server also.

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• Can I create an SSH user which can access only certain directory?

  - by RiMMER

  I have a Virtual Private Server which I can connect to using SSH with my root account, being able to execute any linux command and access all the disk area, obviously. I would like to create another user account, which would be able to access this server using SSH too, but only to a certain directory, for example /var/www/example.com/ For example, imagine this user has a HUGE error.log file (500 MB) located in /var/www/example.com/logs/error.log When accessing this file using FTP, this user needs to download 500 MB to view the last lines of the log, but I'd like him to be able to execute something like this: tail error.log Therefore I need him to be able to access the server using SSH, but I don't want to grant him access to all server areas. How can I do this?

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• My Smart-Pad doesn't work, even when I activate it

  - by Darryn

  I have an Asus X5DIJ, and I have had it since Christmas. However, today, the Smart-Pad stopped working. I wasn't clicking anything, I was just typing. Someone suggested downloading drivers, and I'm not to good with guides, so can anyone assist me? Also, when I click on the Smart-Pad icon in the notification area, that icon is crossed out. There is a red X over it, no matter if it is on / off. Can anyone help me, this has happened to my cousin who has the same laptop as me, he now uses a mouse, but I'd rather keep the Smart - Pad.

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• replacing 3 Cisco Catalyst 4500

  - by hoberion

  Our network supplier recommends replacing our 3 cisco catalyst 4500's because they are EOL and dont speak OSPF (which we really want) Its not my area of expertise so I cant say for sure if we really need to replace these units but for my company the estimated costs of 250K euro is a huge problem. Is there any way to cut down on costs (without moving from cisco devices), I heard the 4500´s can speak ospf but would need an upgrade of sorts? edit: version: IOS (tm) Catalyst 4000 L3 Switch Software (cat4000-I9K91S-M), Version 12.2(20)EW, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1) supervisor: WS-X4013+ Cisco Catalyst 4500 Series Supervisor Engine II-Plus density: WS-X4306-GB Cisco Catalyst 4500 Gigabit Ethernet Module, 6 Ports (GBIC) WS-X4306-GB Cisco Catalyst 4500 Gigabit Ethernet Module, 6 Ports (GBIC) WS-X4548-GB-RJ45 Cisco Catalyst 4500 Enhanced 48-Port 10/100/1000 Module (RJ-45) WS-X4548-GB-RJ45 Cisco Catalyst 4500 Enhanced 48-Port 10/100/1000 Module (RJ-45) WS-X4548-GB-RJ45 Cisco Catalyst 4500 Enhanced 48-Port 10/100/1000 Module (RJ-45)

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• Network monitoring solution

  - by Hellfrost

  Hello Serverfault ! I have a big distributed system I need to monitor. Background: My system is comprised of two servers, concentrating and controlling the system. Each server is connected to a set of devices (some custom kind of RF controllers, doesnt matter to my question), each device connects to a network switch, and eventually all devices talk to the servers, the protocol between the servers and the devices is UDP, usually the packets are very small, but there are really a LOT of packets. the network is also somewhat complex, and is deployed on a large area physically. i'll have 150-300 of these devices, each generating up to 100+ packets per second, and several network switches, perhaps on 2 different subnets. Question I'm looking for some solution that will allow me to monitor all this mess, how many packets are sent, where, how do they move through the network, bandwidth utilization, throughput, stuff like that. what would you recommend to achieve this? BTW Playing nice with windows is a requirement.

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• Make own dial-up ISP using broadband connection [on hold]

  - by SkylarMT

  So, I see no reason why this wouldn't be possible. I have a Linux server (a Raspberry Pi to be exact) connected via Ethernet to a broadband ISP. I want to be able to dial a number, have it go through the normal telephone network, onto the Internet via a VoIP provider (I know you can call a Skype user from a landline), to my Raspberry Pi, and then have the Pi connect me to the Internet. I've found guides on making your own ISP, but they all involve a dedicated phone line on the server end. Is there a way to do this with no modem on the server end? I live in an area with a lot of people still on dialup, and if I pull this off I could make some extra money. Thanks!

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• What requirements does an IT department work space need?

  - by Rob

  Hello all, i need to provide a list of workspace requirements to the IT director for my network operations team. So far I got Secure workspace - so nothing gets stolen and people cant come up to us asking for support (they need a ticket from the helpdesk) Quite area - so that we can work and not be disturbed by the loud project managers who play soccer in the office sometimes. A large table or desk where we can setup and or config systems and servers if needed. What else do we need? Thanks in advance.

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• How do I get write access to ubuntu files from Windows?

  - by Steven

  I'm running Ubuntu 11.10 on my Virtual Machine as a web server. I've mounted the W:/ drive in Win 7 to my /www folder in Ubuntu. I can read the files, but I'm not able to write to the files. In Samba, I have created the following user: <www-data> = "<www-data>" And given guest ok for the www folder: [www] comment = Ubuntu WWW area path = /var/www browsable = yes guest ok = yes read only = no create mask = 0755 ;directory mask = 0775 force user = www-data force group = www-data I've also run sudo chmod -R 755 www to make ensure correct rw access. What am I missing in order to get write access to my ubuntu files from Windows?

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• disable subtitles in mkv in quicktime

  - by Halst

  I want to watch movies without subtitles. And I also like QuickTime for the feature that it could extend the frame to fit the screen (even though it hides some area from the sides). I have Perian installed and I want to watch mkv files, but they are all with subtitles. In QuickTime in View-Subtitles the only option is Off, but still I can see the subtitles. VLC plays same movies without subtitles, but it doesn't have this nice feature of extending the movie frame so that it fits the screen.

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• MBP Bluetooth PAN connection with iPhone 4

  - by Chetan Sachdev

  I am trying to share MBP(OSX 10.8.3) internet connection with iPhone 4 (iOS 6) using Bluetooth PAN(Personal Area Network). Problem is Bluetooth PAN is not getting an ip address. I have tried to renew DHCP lease but nothing works. When I give a Manual IP address, the Bluetooth PAN goes green but doesn't shows the connection in iPhone. Is it possible to share the internet connection via Bluetooth. Note: I don't want to create an Ad-hoc connection over wifi.

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• Configure postfix to filter email into hold queue

  - by Ian

  Hey, I would like postfix to send all emails received on SMTP off to an external process, which will decide whether to allow them through as normal, or whether to put them into the hold queue (or another quarantine area), where they have to wait for admin approval. I was thinking of doing this with an after-queue content filter, which uses pipe(8) to run a script on each message, and the script itself will spawn "postsuper -h " if it decides to put the message on hold. Then the admin can do postsuper -d or -r to delete or pass the message on as appropriate. So, my questions are - a) will this work, and b) is this the best way to do it? Would a milter or another type of content filter be a better approach?

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• Are there any sFTP clients that support a proxy that uses NTLM authentication?

  - by Iraklis

  The title pretty much summarizes the question. We have deployed an sFTP server that needs to be accessed from our client's MS Windows Pc's that reside within a restricted local area network. The only way they can get out for their Intranet is to use an HTTP proxy that requires NTLM authentication. From what I understand all open-source sFTP clients (FilleZilla,WinSCP,etc) do NOT support NTLM authentication (Because of legal issues). I know that there are workarounds to this (installing a local proxy at the machine that understands NTLM) but this would break all sorts of security policies of our client. So my question is : Does anyone know of any sFTP client that supports a NTLM Proxy?

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• Blocking a country (mass iP Ranges), best practice for the actual block

  - by kwiksand

  Hi all, This question has obviously been asked many times in many different forms, but I can't find an actual answer to the specific plan I've got. We run a popular European Commercial deals site, and are getting a large amount of incoming registrations/traffic from countries who cannot even take part in the deals we offer (and many of the retailers aren't even known outside Western Europe). I've identified the problem area to block a lot of this traffic, but (as expected) there are thousands of ip ranges required. My question now (finally!). On a test server, I created a script to block each range within iptables, but the amount of time it took to add the rules was large, and then iptables was unresponsive after this (especially when attempting a iptables -L). What is the most efficient way of blocking large numbers of ip ranges: iptables? Or a plugin where I can preload them efficiantly? hosts.deny? .htaccess (nasty as I'd be running it in apache on every load balanced web server)? Cheers

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• Authorization error when testing FTP to UNC

  - by user64204

  We have a Windows Server 2008 R2 with Active Directory (hereafter called DC) running as a domain controller on which we have IIS and an FTP site installed. We have a second Server 2008 (hereafter called SHARE) which is joined to that domain and has a disk shared as a network share (\\share\Office). That network share is used as the ftp's physical path on DC. We've tested the FTP from the IIS FTP configuration panel, by clicking on Basic Settings... then Test Settings.... When setting Administrator as a username with the Connect as... option, everything is fine: When no user is provided we can the below error: Q1: Could someone explain in more understandable terms what is written in the Details text area?

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• What's the best way to monitor a large number of application pools in IIS7?

  - by Kev

  Some background first - We're running IIS 7 on Windows 2008. We're running around 250 websites per server with each site in it's own application pool. I need a way to monitor each application pool for crashes and hangs and to send an email alert if an application pool is unresponsive for more than say 2 minutes. I thought about having a virtual directory mapped into each site with an ASP.NET page that we could poll via our existing monitoring system (HostMonitor). Does anyone else have experience in this area?

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• Beam display from any computer to shared display

  - by rcourtna

  There are probably a lot of ways to skin this cat. Looking for the cleanest. In our office, we have a large display in a common area. We want to allow any computer in our office (mac, linux, windows) to output its video on the large display. Since some of the computers in the office are stationary, and it's not practical to run video cables everywhere, it would be preferable to make this all happen through the network. It is also possible for us to connect a dedicated (& networked) PC to the large display. How can I do this?

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• smallest footprint for Web Application server?

  - by edgardodelamanta

  There are times when you need to spare hardware resources (either to keep using legacy hardware, to play the embedded card, or just to be efficient because a large footprint is trashing CPU caches, leading to unacceptable levels of idle-states). In this spirit, some efforts have been made to make 'light' ports of Java or Mono (C# for Linux), and they range in the 80-50 MB (instead of the 100-200 MB). Add a Web server (Apache, IIS, etc.) to the scripting engine and you can happily dive into the GB (IIS + .Net) only to load the tool in memory. Anybody with more modest tools in the specs area?

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• wifi routers and concurrent devices

  - by Joelio

  We have a Linksys WRT54G WiFi router in our office which was working great when we had 5-6 folks. Now on peak days we have 10-15 people, each with a computer, smartphone, etc, and an ooma VOIP device. On average 1-2 times a day I need to go hard reboot the router, and sometimes the border router (Cox-supplied device). I assume this is just because the router cant handle this many concurrent users. So my question is can these consumer routers handle this kind of load? If not, would adding more devices solve the problem, and how close proximity can I put 2 routers without having interference problems (our office area is not that big physically)?

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• Experiences with Google TiSP?

  - by Zypher

  i got an email from google a couple of hours ago (around 12AM EST today) that Google's TiSP service is now available in my area. this seems like a great deal compared to my cUrrent 16Mbps cable coNction at work, however i'm a lIttle nervous about the fact that linux support is "Coming soon". i was wOndering if anyone had successfully installed this system and gotten it woRking with their linux infrastructure? I'm assuming that there shouldn't be any issues siNce we have an ASA in front of our internet. TiSP Shouldn't care what is behind that. Any insight would be greatly appreciated!

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• How to configure sudoers with path wildcards?

  - by C. Lee

  I need sudo for a command for any path under a particular area. Example: sudo mycommand /opt/apps/myapp/... What is the sudoers syntax to allow this command to run in any path that falls under /opt/apps/myapp? This is Solaris 10 sudo. Thank you for your reply, but I don't need wildcards for the path to the commands, but wildcards for the arguments for the commands. For example, we want to do something like... sudo mycmd /opt/userarea/area1 sudo mycmd /opt/userarea/area1/area2 sudo mycmd /opt/userarea/area1/area2/area3 So far, using wildcards for the arguments in sudoers look like this: /opt/userarea/* /opt/userarea/*/* And it seems like if we want to have N levels of directories, then we need N lines in sudoers! Is there a better way to include all N levels in one line in sudoers? Thanks.

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• Windows 7 Bluetooth Configuration

  - by ahsteele

  I have Bluetooth installed in my laptop. The Bluetooth is enabled according to the status light. However, I do not see Bluetooth listed in device manager or have a control panel option for it. A scan for new hardware doesn't turn up Bluetooth. Nor are any devices listed with a Yellow Exclamation Point. I do have three USB Hubs Listed as "Generic USB Hub." There is no Bluetooth icon in the notification area and Bluetooth is not listed under Devices and Printers. What am I missing?

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• CentOS Vs Windows Server 2008

  - by Steve

  Hi, Apologies if the question appears ambiguous, I have little experience in this area and was after some informed opinions. I am deploying a test scenario of a server/client network and need to make some choices for Server. The client will be a Windows system as it meets the requirements for the client, the server choice has more room for selection. From my experience with Linux in general and the appealing nature of open source for low cost, security etc and the availability and performance of database and web server programs I have been considering CentOS as a server choice. I have the ability to make most of the choices of what software / server packages I wish to install. This includes Active Directory (something I have no experience with). How well does this operate with Windows clients? Am I being too selective and creating unnecessary complication by setting out not to use a Windows Server OS?

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