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• Revamping an old and unstable office IT-solution using Windows Server and OpenVPN

  - by cmbrnt

  I've been given the cumbersome task to totally redo the IT-infrastructure for a customer's office. They are currently running Windows XP all over, with one computer acting as a file server with no control over which users have access to which files, and so on. To top it off, this file server also functions as a workstation, which means it gets rebooted every time the user notices some sluggish behavior or experiences problems with flash games. To say the least, this isn't working for them. Now - I've got a very slim budget, but I need to set up a new server, and I wish to run Windows Server 2008 on it. I also need the ability to access the network remotely via VPN. Would it be a good idea to install VMware ESXi 4.1 onto the new server, and then run Windows Server 2008 as well as a separate Debian install for openvpn on it? I don't like the Domain Controller for the future AD to also run a VPN-server, because of stability issues when something goes to hell with either of them. There will be no redundancy though. However, I'm not sure if there is something to gain by installing a VPN solution on the Windows Server itself, when it comes to accessing file shares on the network via VPN. I don't know how to enable users logging in via the VPN to access the remote files, since they will be accessing the network from their own home computers (which is indeed a really bad idea, but this is what I've got to work with). They won't be logged in to the windows Domain, but rather their home workgroups. I need to be able to grant access to files in certain directories based on the logged in AD-user, but every computer won't necessarily be configured to log into the domain. I'm not sure how to explain this in a good way, but I'd be happy to clarify if somethings not clear. Any help would be great, because I've got a feeling that I can't do this without introducing a bunch of costly new rules when it comes to their IT-solution. I'd rather leave that untouched and go on my merry way to the next assignment.

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• powershell vs GPO for installation, configuration, maintenance

  - by user52874

  My question is about using powershell scripts to install, configure, update and maintain Windows 7 Pro/Ent workstations in a 2008R2 domain, versus using GPO/ADMX/msi. Here's the situation: Because of a comedy of cumulative corporate bumpfuggery we suddenly found ourselves having to design, configure and deploy a full Windows Server 2008R2 and Windows 7 Pro/Enterprise on very short notice and delivery schedule. Of course, I'm not a windows expert by any means, and we're so understaffed that our buzzword bingo includes 'automate' and 'one-button' and 'it needs to Just Work'. (FWIW, I started with DEC, then on to solaris and cisco, then linux of various flavors with a smattering of BSD nowadays. I use Windows for email and to fill out forms). So we decided to bring in a contractor to do this for us. and they met the deadline. The system is up and mostly usable, and this is good. We would not have been able to do this. But it's the 'mostly' part that is proving to be the PIMA now, and I'm having to learn Microsoft stuff anyway until/if we can get a new contract with these guys for ongoing operations. Here's my question. The contractor used powershell almost exclusively for deployment, configuration and updating. My intensive reading over the last week leads me to think that the generally accepted practices for deployment, configuration and updating microsoft stuff uses elements of GPOs and ADMX templates, along with maybe some third party stuff like PolicyPak. Are there solid reasons that I've not found yet that powershell scripts would be preferred over the GPO methods? I'm going to discuss this with the contractor lead when he gets back from his vacation, and he'll be straight with me (nor do I think they set us up). But I can also see this might be a religious issue, so I would still like some background on this. Thoughts? or weblinks? Thanks!

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• Allow outgoing connections for DNS

  - by Jimmy

  I'm new to IPtables, but I am trying to setup a secure server to host a website and allow SSH. This is what I have so far: #!/bin/sh i=/sbin/iptables # Flush all rules $i -F $i -X # Setup default filter policy $i -P INPUT DROP $i -P OUTPUT DROP $i -P FORWARD DROP # Respond to ping requests $i -A INPUT -p icmp --icmp-type any -j ACCEPT # Force SYN checks $i -A INPUT -p tcp ! --syn -m state --state NEW -j DROP # Drop all fragments $i -A INPUT -f -j DROP # Drop XMAS packets $i -A INPUT -p tcp --tcp-flags ALL ALL -j DROP # Drop NULL packets $i -A INPUT -p tcp --tcp-flags ALL NONE -j DROP # Stateful inspection $i -A INPUT -m state --state NEW -p tcp --dport 22 -j ACCEPT # Allow established connections $i -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow unlimited traffic on loopback $i -A INPUT -i lo -j ACCEPT $i -A OUTPUT -o lo -j ACCEPT # Open nginx $i -A INPUT -p tcp --dport 443 -j ACCEPT $i -A INPUT -p tcp --dport 80 -j ACCEPT # Open SSH $i -A INPUT -p tcp --dport 22 -j ACCEPT However I've locked down my outgoing connections and it means I can't resolve any DNS. How do I allow that? Also, any other feedback is appreciated. James

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• What is the risk of introducing non standard image machines to a corporate environment

  - by Troy Hunt

  I’m after some feedback from those in the managed desktop or network security space on the risks of introducing machines that are not built on a standard desktop image into a large corporate environment. This particular context relates to the standard corporate image (32 bit Win XP) in a large multi-national not being suitable for a particular segment of users. In short, I’m looking at what hurdles we might come across by proposing the introduction of machines which are built and maintained by a handful of software developers and not based on the corporate desktop image (proposing 64 bit Win 7). I suspect the barriers are primarily around virus definition updates, the rollout of service packs and patches and the compatibility of existing applications with the newer OS. In terms of viruses and software updates, if machines were using common virus protection software with automated updates and using Windows Update for service packs and patches, is there still a viable risk to the corporate environment? For that matter, are large corporate environments normally vulnerable to the introduction of a machine not based on a standard image? I’m trying to get my head around how real the risk of infection and other adverse events are from machines being plugged into the network. There are multiple scenarios outside of just the example above where this might happen (i.e. a vendor plugging in a machine for internet access during a presentation). Would a large corporate network normally be sufficiently hardened against such innocuous activity? I appreciate the theory as to why policies such as standard desktop images exist, I’m just interested in the actual, practical risk and how much a network should be protected by means other than what is managed on individual PCs.

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• Transfer of ownership of Windows 7

  - by ziggy

  I am thinking of purchasing a copy of Windows 7 via either ebay or GumTree. I am unsure as to how the product key works. A close friend of mine is warning me against buying it from ebay as he is suggesting that once it has been used, the operating system registers itself on microsoft servers using the serial number of the motherboard of the system where it has been installed. This means once installed on one machine you wont be able to install it on another machine. Now i am struggling to believe that an operating system can only be installed on one machine. Can someone please explain exactly how this works. I can see a lot of copies being sold on Ebay which are used. I used the 'Ask a question' option and the majority of the users are saying that i should be able to use it. If someone buys Windows 7 from the shop, installs it on his PC but then decides that he wants to sell it can he not sell it? Will the person buying it not be able to use it? Does the person selling it have to somehow unregister it first? What do i need to look out for if buying it from Ebay? Thanks

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• connections in FIN_WAIT and CLOSE_WAIT state

  - by Raj

  I would like to elaborate the setup so You guys can understand the question and answer more accurately. I have HAProxy as load-balancer, 4 webservers (apache 2.2.3) and one database server (MySQL 5). I am monitoring these servers by nagios. I have disabled the keepalive on apache as we have only 8GB of memory. Now what happens whenever I receive alerts for high memory and cpu utilization, I have observed that the connections from apache to database server hang in established mode (keepalive with timeout value of 7200) and at other side means connections between haproxy and apache shows status as FIN_WAIT on haproxy server and CLOSE_WAIT at apache side. I also see the huge memory swapping and apache taking the most of the memory. I did strace on apache process and did not find any information. strace gets attached to apache process but did not produce any output. The processlist on Mysql server show s those processes in sleep mode. The application on webserver is Magento a php application. if you need further information please let me know. Thanks.

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• Why does windows (file) explorer try to connect to port 80 (http) instead just using smb?

  - by Erik

  Background: On an almost freshly installed pc I get a message along the lines of : "windows cannot find some-file-server-name. Check the spelling and try again"... when trying to access any fileshare. Troubleshooting so far: pinging works. Both by ip and by name the almost identical pc next to this one can access the file server everyone else can access the file server the pc in question can not access other open fileshares but it can connect to the internet And now for what I think is the interesting part: running wireshark with ip.addr == local.ip.add.ress and ip.addr == server.ip.add.ress tells me that it tries to connect over http. the server replies but after a few messages back and forth it stops the other machine of course just uses smb I guess port 80 just means it defaults to webdav, but I haven't been able to find anything that can cause this. Googling it the closest thing I found was this http://www.techrepublic.com/article/get-vista-and-samba-to-work/6353849 but then again this was an XP pc and I wasn't able to connect to other native Windows shares (and I tried the solution anyway and it didn't work.)

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• How do I get yum to see updates to a local repo without cleaning cache?

  - by Matt

  I have set up a local yum repository which I use to install test builds. For the testing purposes, my packages are versioned by <svn version number>.<date>.<time> (e.g. 12345.20110908.150404 The trouble is, once I make a new RPM, copy it to the repository directory and run createrepo $REPO_DIR, yum does not see the new RPM as being available. $ cd $REPO_DIR $ ls -1 repodata package-12345.20110908.150404-1.x86_64.rpm package-12345.20110908.174329-1.x86_64.rpm $ createrepo . # ...snip... $ rpm -q package package-12345.20110908.150404-1.x86_64 $ yum list --showduplicates package Installed Packages package.x86_64 12345.20110908.150404-1 @repo Available Packages package.x86_64 12345.20110908.150404-1 repo I can see the updates and grab them if I run yum clean all and then re-fetch the metadata, but I think this just means I need to be doing something else from the repo, as I don't have to do that for other yum repos. How do I need to set up my local repository so that I only need to run yum update from the client without having to clean my yum cache?

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• How do I back up Hyper-V VMs with Windows Server backup on Windows Server 2008 R2?

  - by Chris

  I've searched this site and google, and I CAN find information about how to back up Hyper-V virtual machines by using Windows Server Backup from the Hyper-V host in Windows Server 2008. You have to set up a registry key to enable the Hyper-V VSS writer, and then you can take online backups of your VMs. However, all the information I have found is about a year old, and none of it has been updated for Windows Server 2008 R2. I tried to run the "FixIt" .msi found here: http://support.microsoft.com/kb/958662 ... but it said that it was not applicable to my operating system. So I am thinking either Windows Server 2008 R2 already has its VSS service for Hyper-V enabled, or it still needs to be enabled but the FixIt package doesn't feel comfortable operating on an OS that wasn't RTM at the time. I went ahead and scheduled a windows server backup for 9pm tomorrow. It said it would take 86 GB, which means it MUST be counting those VMs. But will this backup fail? Can anyone confirm whether you have to apply the same registry changes for R2?

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• MySQL : table organisation for very large sets with high update frequency

  - by Remiz

  I'm facing a dilemma in the choice of my MySQL schema application. So before I start here is a picture extremely simplified of my database : Schema here : http://i43.tinypic.com/2wp5lxz.png In one sentence : for each customer, the application harvest text data and attached tags to each data collected. As approximation of the usage of each table, here is what I expect : customer : ~5000, shouldn't grow fast data : 5 millions per customer, could double or triple for big customers. tag : ~1000, quite fixed size data_tag : hundred of millions per customer easily. Each data can be tagged a lot. The harvesting process is permanent, that means that around every 15 minutes new data come and are tagged, that require a very constant index refreshing. A lot of my queries are a SELECT COUNT of DATA between specific DATES and tagged with a specific TAG on a specific CUSTOMER (very rarely it will involve several customers). Here is the situation, you can imagine with this kind of volume of data I'm facing a challenge in term of data organization and indexing. Again, it's a very minimalistic and simplified version of my structure. My question is, is it better: to stick with this model and to manage crazy index optimization ? (which involves potentially having billions of rows in the data_tag table) change the schema and use one data table and one data_tag table per customer ? (which involves having 5000 tables on my database) I'm running all of this on a MySQL 5.0 dedicated server (quad-core, 8Go of ram) replicated. I only use InnoDB, I also have another server that run Sphinx. So knowing all of this, I can't wait to hear your opinion about this. Thanks.

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• Timeperiod Setting

  - by Alvin G. Matunog

  I am running Nagios 3.2.3 on CentOS 5.7 32bit and I have a bit of a problem scheduling timeperiods. Please help me. Objective, to stop monitoring during server restart (since the server will be restarted and will be restarted automatically because of updates and system backup). The restart is scheduled every 1st Sunday of every month. My monitoring runs 24x7 but during restarts I want to stop the monitoring and resume after 30 mins. So every 1st Sunday I want my schedule to be 00:00-11:30,12:00-24:00. This means that it will stop at 11:30 and resumes on 12:00nn. If I set this on every Sunday there is no problem. But if I set this time on every 1st Sundays, it stops at 11:30 but resumes on the next day (Monday) and not on 12:00nn Sunday. I don't know what I am missing. If I set on regular weekdays there is no problem. But on Offset weekdays (1st Sunday) it doesn`t work the way it should have. Here is my definition; define timeperiod{ name 1st_sunday timeperiod_name 1st_sunday alias No monitoring every 1st Sunday thursday 1 00:00-11:30,12:00-24:00 } define timeperiod{ timeperiod_name irregular alias regular checking use 1st_sunday sunday 08:30-22:00 monday 08:30-22:00 tuesday 08:30-22:00 wednesday 08:30-22:00 thursday 08:30-19:10,19:20-22:00 friday 08:30-22:00 saturday 08:30-22:00 } Can anyone help me? Please? Thank you.

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• How can one restrict network activity to only the VPN on a Mac and prevent unsecured internet activity?

  - by John

  I'm using Mac OS and connect to a VPN to hide my location and IP (I have the 'send all traffic over VPN connection' box checked in teh Network system pref), I wish to remain anonymous and do not wish to reveal my actual IP, hence the VPN. I have a prefpan called pearportVPN that automatically connects me to my VPN when I get online. The problem is, when I connect to the internet using Airport (or other means) I have a few seconds of unsecured internet connection before my Mac logs onto my VPN. Therefore its only a matter of time before I inadvertently expose my real IP address in the few seconds it takes between when I connect to the internet and when I log onto my VPN. Is there any way I can block any traffic to and from my Mac that does not go through my VPN, so that nothing can connect unless I'm logged onto my VPN? I suspect I would need to find a third party app that would block all traffic except through the Server Address, perhaps Intego Virus Barrier X6 or little snitch, but I'm afraid I'm not sure which is right or how to configure them. Any help would be much appreciated. Thanks!

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• IIS7ASP.Net 4.0 - 404 errors only for external clients

  - by dmcgiv

  recently we moved an ASP.Net 3.5 website to 4.0 (integrated mode) and when we deployed to the clients server (Windows Server 2008 Web edition) we notice that some .aspx pages are serving 404 errors. What is strange is that 1) the pages exist 2) if you browse from the server itself the page is served as normal, only external clients get the 404 3) it's the default 404 error page not the one configured in the web.config 4) it only happens for some .aspx pages, and I've not been able to establish a link between the pages that are not being served externally. We are using a URL rewriter module which I first thought may be at fault but then realised that only some of the failing pages are being rewritten. I've also tested removing the http module and the problem still persists. As everything is working as expected when logged onto the server I was thinking it my be some sort of permission issue, but why would it only affect a few pages? I turned on failed request tracking and the debug files are being generated with the expected 404 error, although at the moment I'm not sure what most of the data means so can't decipher what's going on internally. I'd really appreciate some help with this one.

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• Custom PCI bracket with support, for custom PCB?

  - by newbiez

  I am considering to put a custom PCB card that I made, into my computer. It won't go on any PCI connector, it plugs in on a USB connector on the motherboard, via a ribbon cable. I need thou to plug a device to it; which means that either I leave the PCB outside the case, hanging by the ribbon (bad idea), or I could put it in a PCI slot, using a bracket. The issue is that the brackets that I have, do not have tabs, so I have no way to screw the PCB on them. I was hoping to find something that would allow me to put the PCB on it, and then just fit it in the PCI bracket opening, like this: http://www.idotpc.com/TheStore/pc/viewPrd.asp?idproduct=1203&idcategory=0 This one won't fit the bill since the holes are too close apart, compared to the one that I have already on the PCB (and can't make more holes). Do you know if there is a place where they make universal PCI bracket mounting systems for custom PCB? I just need one, so can't even order a custom one (they ask me 120 dollars for one). Thanks in advance!

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• Mysql start fails with Operating System error 13

  - by curious

  I have XAMPP on my Ubuntu Lucid system and everything worked fine. But there seems to be some problem now and mysql wouldn't start. I had tried to recover a few Drupal databases and hence copied the raw files to /opt/lampp/var/mysql folder like all other database folders. And, I guess that could have caused the problem. I am pasting the last few lines of the error log. Someone please help me out. 100814 15:17:47 mysqld_safe Starting mysqld daemon with databases from /opt/lampp/var/mysql 100814 15:17:47 [Note] Plugin 'FEDERATED' is disabled. 100814 15:17:47 [ERROR] Can't open shared library 'libpbxt.so' (errno: 0 API version for STORAGE ENGINE plugin is too different) 100814 15:17:47 [Warning] Couldn't load plugin named 'PBXT' with soname 'libpbxt.so'. 100814 15:17:48 InnoDB: Operating system error number 13 in a file operation. InnoDB: The error means mysqld does not have the access rights to InnoDB: the directory. InnoDB: File name /opt/lampp/var/mysql/ibdata1 InnoDB: File operation call: 'open'. InnoDB: Cannot continue operation.

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• Lenovo System Update Breaks Windows Live

  - by wolfvilleian

  Hey everyone, I've been racking my brain (and fingers from typing) trying to solve this issue to no avail. I have a Lenovo computer and I install their system update tool to install all my missing drivers. However after this tool is installed Windows Live 2011 breaks, it will no longer sign in giving error number 8e5e0247 all the solutions online haven't helped. It appears that a language setting somewhere gets set to en_ms, and I'm en_ca. My computer is running Windows 7 x64. When i try to sign onto messenger it gives an error that (with some research) means your locale or language is not supported, I've searched my computer for any reference to en_ms but find none. Also a few other things seem to have broken, When a UAC box comes up it is no longer able to identify the publisher of anything, and also the indexing service does not work (I'm not sure if the indexing issue is related, but the UAC issue happened right after installation), I had this issue before but I don't remember how I fixed it, I believe it had something to do with environmental variables. When it goes to sign in it gets as far as the "Loading contacts" then stops and goes back to the sign in screen. Has anyone seen this before? Thanks

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• SSL Mail server connection times out on send()

  - by Jivan

  When trying to programmatically send an email from a website of mine, with PHP Pear Mail package with SSL connection, PEAR:Mail replies the following : Failed to connect to example.blabla.net:PORT [SMTP: Failed to connect socket: connection timed out (code: -1, response: )] I looked for similar questions on SO and SF, all the answers asking the OP to test a request on telnet or ssh in command line. So, that is what I did and here is what happens : $ ssh -l myusername -p PORT example.blablabla.net _ Here, '_' in the second line means that NOTHING happens. Indefinitely, which seems coherent with the timeout message I had from PEAR:Mail. So PEAR:Mail seems out of cause. But, what I have to tell you is that yesterday, it just worked. Connection was properly established, mails were properly sent, etc. Just today, it doesn't work anymore and I absolutely don't know why. I restarted Apache (in case an extension was broken), restarted mail services, etc. Still. No effect. Before yesterday (when it worked) and today (when it doesn't anymore), I just didn't touch the server and did nothing on it, simply because I took a day off to write some blog post! Have anyone of you encountered similar problem ? The problem seems quite common, judging after some googling, but the solution doesn't. Thanks for any help ! (note on config : CentOS 6.4 x86_64 with cPanel/WHM)

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• Wipe free space on LVM-LUKS (dm-crypt) Volume

  - by peter4887

  My three partitions for my system are created with LVM on a LUKS partition (dm-crypt). These are /home, / and swap. The filesystem is ext4. They are encrypted, because they are on my laptop and I don't want that some laptop thieves get my data. But I often share my laptop with other people so they can access my encrypted partitions. I don't want that these people can recover my cache and all the data I deleted. So I'm now trying to wipe all my free space on /home to prevent against recovering with tools like photorec. (one overwrite should do, the need of multiple overwriting is just a rumor) But still I haven't found any solution to wipe this free space successfully. I tried dd if=/dev/zero of=/home/fillitup bs=512 count=[count of free sectiors] so my partition was complete full of data. df /dev/mapper/home said 100% is used and there are 0 sectors available. But I could still recover gigs of data with photorec, although I selected to recover just form the free space. photorec displays: /dev/mapper/home - 340 GB / 317 GiB (RO) , but df displays that the size of /home is just 313G, why are there these differences and what did the 340GB means? It looks like there is a place on my /dev/mapper/home partition, that I can't access to overwrite, but I can access it to recover. I also checked for corrupted sectors, but there aren't any. Maybe this is the space between my existing files? Did anyone knows why I can't wipe my free space with dd, and how I can find the location of the loads of recoverable files, to securely delete them?

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• Input/output error reading USB backup drive on CentOS 6.4

  - by Kev

  I'm suddenly seeing some strange behaviour on our USB backup drive that doesn't make sense to me: (2013-10-21 14:58:23 [root@newdc /]$ cd /mnt/backup/ (2013-10-21 14:59:03 [root@newdc backup]$ ls -la ls: reading directory .: Input/output error total 0 (2013-10-21 14:59:05 [root@newdc backup]$ df -h /mnt/backup Filesystem Size Used Avail Use% Mounted on /dev/sda1 917G 843G 28G 97% /mnt/backup How is it possible for the OS to know how much is in use, but I can't ls any of it as root? Or more to the point, what problem does this indicate? /var/log/messages said this: Oct 21 14:57:54 g5 kernel: EXT4-fs error (device sda1): ext4_journal_start_sb: Detected aborted journal Oct 21 14:57:54 g5 kernel: EXT4-fs (sda1): Remounting filesystem read-only But...read-only is something different than 'throw an io error'... After unmounting to try fsck on it, I had someone on-site look at it, and the drive was not spun up, and had a slow-flashing light, which I believe means it was in a power-suspend mode. So I had them unplug and replug the USB cable, and now (before remounting) it says: fsck from util-linux-ng 2.17.2 e2fsck 1.41.12 (17-May-2010) /dev/sda1: clean, 2805106/61046784 files, 181934167/244182016 blocks I then mount it and now ls works and df reports: Filesystem Size Used Avail Use% Mounted on /dev/sda1 917G 680G 191G 79% /mnt/backup What would cause it to go into such a state without being asked to? Why all the weird behaviour, and now it appears to not be corrupt?

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• vSphere education - What are the downsides of configuring virtual machines with *too* much RAM?

  - by ewwhite

  VMware memory management seems to be a tricky balancing act. With cluster RAM, Resource Pools, VMware's management techniques (TPS, ballooning, host swapping), in-guest RAM utilization, swapping, reservations, shares and limits, there are a lot of variables. I'm in a situation where clients are using dedicated vSphere cluster resources. However, they are configuring the virtual machines as though they were on physical hardware. In turn, this means a standard VM build may have 4 vCPUs and 16GB or more of RAM. I come from the school of starting small (1 vCPU, minimal RAM), checking real-world use and adjusting up as necessary. Some examples from a "problem" cluster. Resource pool summary - Looks almost 4:1 overcommitted. Note the high amount of ballooned RAM. Resource allocation - The Worst Case Allocation column shows that these VMs would have access to less than 50% of their configured RAM under constrained conditions. The real-time memory utilization graph of the top VM in the listing above. 4 vCPU and 64GB RAM allocated. It averages under 9GB use. Summary of the same VM What are the downsides of overcommitting and overconfiguring resources (specifically RAM) in vSphere environments? Assuming that the VMs can run in less RAM, is it fair to say that there's overhead to configuring virtual machines with more RAM than they need? What is the counter-argument to: "if a VM has 16GB of RAM allocated, but only uses 4GB, what's the problem??"? E.g. do customers need to be educated? What specific metric should be used to meter RAM usage. Tracking the peaks of "Active" versus time?

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• Distributing Microsoft Office Template or Macro over the network

  - by zfranciscus

  We have around 400 users who use Word and we want to make their life easier by distributing templates and macros over the network. The easiest way to do this of course to setup a shared network folder and let them get the appropriate templates and macros. Of course, each user has to know where to copy these files to in their local PC, and we have to rely on constant email communication to let them know for newer version of the macro and templates. The next alternative is to ask them to configure Word to point to these network folder. But of course any disruption to the network means disruption to their work. We are thinking to setup a synchronization mechanism that downloads new templates to their local machine. We are also thinking to make this sync tool to prompt users that it will download new templates - you know just to give them visibility that they are receiving changes. We are wondering what is the best approach that people usually use in their workplaces ? Are there any specific tool that can make this task easier ?

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• CentOS server. What does it mean when the total used RAM does not equal the sum of RES?

  - by Michael Green

  I'm having a problem with a virtual hosted server running CentOS. In the past month a process (java based) that had been running fine started having problems getting memory when the JVM was started. One strange thing I've noticed is that when I start the process, the PID says it is using 470mb of RAM while the 'used' memory immediately drops by over a 1GB. If I run 'top', the total RES used across all processes falls short of the 'used' listed at the top by almost 700mb. The support person says this means I have a memory leak with my process. I don't know what to believe because I would expect a memory leak to simply waste the memory the process is allocated not to consume additional memory that doesn't show up using 'top'. I'm a developer and not a server guy so I'm appealing to the experts. To me, if the total RES memory doesn't add up to the total 'used' it indicates that something is wrong with my virtual server set-up. Would you also suspect a memory leaking java process in this case? If I use free before: total used free shared buffers cached Mem: 2097152 149264 1947888 0 0 0 -/+ buffers/cache: 149264 1947888 Swap: 0 0 0 free after: total used free shared buffers cached Mem: 2097152 1094116 1003036 0 0 0 -/+ buffers/cache: 1094116 1003036 Swap: 0 0 0 So it looks as though the process is using (or causing to be used) nearly 1GB of RAM. Since the process (based on top is only using 452mb, does that mean that the kernal is all of a sudden using an additional 500mb?

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• Does image block (firefox addon) save internet bandwidth usage?

  - by dkjain

  Does image block save internet bandwidth usage. I have a data capped plan from my ISP ( 5GB at 2mbps and thereafter 256 kpbs / pm). I doubt if the addon or other similar addon actually saves bandwidht. Here is my point of view, pls correct if that is wrong. When a request is sent to the server, the server sends out whatever page it's requested to serve with all its text and images etc. So essentially my ISP has made his pipe available for the data to reach me thus he would count those bytes under my data plan. When the data arrives it's all first stored to my browser cache (folder) area which means all the data has actually been received by me/computer using my ISP's pipe. The browser then fetches those data from the cache and displays it. By hitting the stop button or blocking images via ur addon I am just choosing not to display the data which would remain in the cache or eventually be discarded if still on the network pipe after a timeout limit. The point is the data request have been completed by the ISP and so the data would be metered and thus using addon such as image block or hitting stop button while page is loading does not in any way save internet bandwidth. Your comments plz....... Regards dk.

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• Windows Server 2008 R2 creating a multi-year client certificate using the IIS certsrv page while deploying SSTP VPN

  - by Warren P

  I am trying to follow instructions on Technet about deploying a Standard (non-enterprise) SSTP based VPN) that were originally written for Server 2008, but I am using Server 2008 R2, I have gotten as far as the part where it asks you to create a request a Server Authentication certificate. I have deployed IIS, and Active Directory Certificate Services, and chose "Standalone" and "Standard" (non-enterprise) Certificate Authority because I don't have an OID and don't think I should have to get one for a simple deployment of SSTP. The resulting certificates made by the Certification Authority "Issue" command, only have a 1 year period of validity, I want a multi-year certificate. At no point in this process is there any way to input this information unless it's through the Attributes text input area on the Advance Certificate Request page, which appears to be generated using an old ActiveX control, which means I can only do this using the workarounds in the article that I linked at the top, and only using Internet Explorer. Update:: It may be that this question is pointless since self-signed keys do not appear to work, when I try them, using Windows 8 as the VPN client. The problem is that the keys that are self-created by the technique shown here do not have any Certificate Revocation Server URLs and so you get an error "The revocation function was unable to check revocation", and the VPN connection fails.

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• Fake demostration software for command line

  - by Joe

  I'm looking for some software that would be useful for giving demonstrations. I regularly have to show the effects of scrips ect to classes while talking about their effects, and equaly regularly I have finger trouble and have to rewrite various commands - wasting class time and general energy. I'd like to be able to record a sequence of commands in advance, and then play them back at the speed of my choosing. So I might have a file that containes the commands: echo "hello world!" ls ls -l ls -l | sort I'd like to be able to play these commands back by typing similar ones in. So I'd have a blinking command prompt and if I typed 'echo "hxxx' the command prompt would read home$echo "hell and if I typed any other letters the terminal would fill up with the remainder of the command until I press enter, when it executes the command. The point is that even if I screw up the command when typing it, the command that I'd prepared in advance would be executed. My question is - does similar software exist for giving demonstrations? or even, is this an easy thing to script up...? EDIT - two quick things first of all I'm on osx - but it would be nice to get a general solution for other people who arrive here from google. and second a lot of the comments/answers are concentrating on, in effect, making it fast and easy to enter long commands by means of hotkeys and the like. Actually I'd like it to at least look like I'm typing live - that's why I put in the bit about the one-to-one keymapping, but I don't think I explained that quite as well as I could have...

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