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• Cannot assign port 4 to WAN on TP-Link WR740N by DD-WRT wiki

  - by Victor Sergienko

  I'm following the DD-WRT instruction to get TP-Link WR740N v3's Port 4 on a different VLAN, but this doesn't happen. First, I have no "Setup VLANs" settinngs tab in DD-WRT v24-sp2 (07/20/12) std r19519. I can get Internet on Wi-Fi if assigning eth1 to "WAN Port", but then all Ethernet ports get on the same VLAN and any wired connection grabs the DHCP address and Internet connection from router. When following the "old" instruction, if I run, say, nvram set vlan2ports="2 5*", should there appear a new interface, vlan2, in ifconfig, after ifconfig vlan2 up? It doesn't - does it mean there is no support for different VLANs in my software/hardware? What am I missing? Is it impossible to create more VLANs on TP-Link740?

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• Why does 1GBit card have output limited to 80 MiB ?

  - by Gallus

  I'm trying to utilize maximal bandwidth provided by my 1GiB network card, but it's always limited to 80MiB (real megabytes). What can be the reason? Card description (lshw output): description: Ethernet interface product: DGE-530T Gigabit Ethernet Adapter (rev 11) vendor: D-Link System Inc physical id: 0 bus info: pci@0000:03:00.0 logical name: eth1 version: 11 serial: 00:22:b0:68:70:41 size: 1GB/s capacity: 1GB/s width: 32 bits clock: 66MHz capabilities: pm vpd bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation The card is placed in following PCI slot: *-pci:2 description: PCI bridge product: 82801 PCI Bridge vendor: Intel Corporation physical id: 1e bus info: pci@0000:00:1e.0 version: 92 width: 32 bits clock: 33MHz capabilities: pci subtractive_decode bus_master cap_list The PCI isn't any PCI Express right? It's a legacy PCI slot? So maybe this is the reason? OS is a linux.

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• What would happen if I did a "Boot to VHD" to a VHD that was configured to run under Hyper-V?

  - by tbone

  Microsoft has a Hyper-V based VM I'm interested in running, however, I don't have access to a Windows Server 2008 machine to try it on, only a Windows 7 Pro x64 machine (Windows 7 does not support Hyper-V). This is the VM in question: This download contains three Windows Server 2008 R2 SP1 Hyper-V Virtual Machine set for evaluating and demonstrating Office 2010, SharePoint 2010 and Project Server 2010. 2010 Information Worker Demonstration and Evaluation Virtual Machine (SP1) http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=27417 I came across a somewhat relevant article from Scott Hanselman: Less Virtual, More Machine - Windows 7 and the magic of Boot to VHD: http://www.hanselman.com/blog/LessVirtualMoreMachineWindows7AndTheMagicOfBootToVHD.aspx I realize other options are to convert this VM to a VMWare compatible VM or some of the options to run it under VirtualBox. But instead of those routes, I'm wondering: What would happen if I tried to go the "Boot to VHD" route using this Hyper-V VHD? Is it possible that during the boot process, Windows would simply notice that hardware had changed and adjust accordingly, installing the appropriate drivers and continuing on without a hitch?

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• 64 Bit Windows drivers for Inspiron 1720

  - by Rob Allen

  Dell doesn't seem to offer 64 bit drivers specifically for the Inspiron 1720 (laptop). I'm going to be upgrading from Vista 32-bit to Windows 7 64bit and I want to pull down the necessary stuff before hand. Are there any Dell systems that are similar enough to the Inspiron 1720 that I can use for a baseline to make sure I still have Ethernet and WiFi after the reinstall? It doesn't matter if they are for Vista 64 or Windows 7. Identified hardware: Processor: Intel mobile Core 2 Duo T7500 Chipset: Intel Mobile 965 Express Wifi: Intel Pro Wireless Drive Controller: Intel Matrix Graphics: nVidia GeForce 8600M GT Bluetooth: Dell TrueMobile 355 + EDR Ricoh card reader I think anything else, the default Windows drivers will be sufficient. Let me know if you think I missed something thing please.

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• diagnostic software for wifi adapter

  - by Nathan Fellman

  I'm having trouble with my wifi connection. Is there any software out there that can help me determine if the problem is in the drivers or in the hardware? Regretfully, I'm working on Vista Edit: The problem I'm having is that the Vista reports that the wireless radio is connected, shows an IP and all, the router also shows that the computer is connected, but there's no connectivity. I can't logon to the router, and I can't even ping it. When I ping it I get the response: General Failure I have tried connecting with and without various wireless security protocols. I have tried disabling the wireless adapter and re-enabling it from the Device Manager I have tried updating the driver None of this has helped. When I connect via Ethernet (with a cable, that is), everything works fine. Edit: I'm not using any firewall on the computer, that I'm aware of. The IP address for the WIFI adapter is similar to the one for the LAN adapter. They differ by one.

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• Routing and Remote Access Port Mapping not applied to localhost

  - by Computer Guru

  Hi, I've set up Routing and Remote Access (Windows Server 2003) to forward publicip:80 to a server on the private internal network, and that's working great. Incoming requests from the internet to port 80 are correctly forwarded to our internal web server and everything is fine. However, requests on the server itself are not being forwarded. That is, if I open a console window and type "telnet publicip 80" from the server on publicip, the request is not forwarded to the private server. I understand that in RRAS I've mapped port 80 on the public interface to the private server and that's why it's not working; but I don't know how to configure it so that requests from the local PC are also forwarded to the private server. I'd appreciate any help or feedback on the matter. Thanks!

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• Can GoogleApps exist with Exchange 2003

  - by Adam M.

  I am looking at the next step in our Groupware solutions. Rather got with a conventional add a new MS Server/MS Exchange to allow for growth and expanding offices. Could an Office operate with both an existing Exchange server setup and migrate a portion of mailboxes to the GoogleApps platform? I want to see if the we could use the GoogleApps for managers and larger mailboxes, and leave a large amount of small mailboxes on the existing hardware that is configured for Exchange/outlook? Can the two co-exist in an longterm configuration, where they can 'play nice' together? Is there any options that would allow for for this and would this have limitations? Such as the Free/busy connectors (Calendaring)? Is there any pitfalls for this type of design? Thanks

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• Large file copy from NFS to local disk performance drop

  - by Bernhard

  I'm trying to copy a 200GB file from an NFS mount to a local disk. The local disk is an XFS filesystem on a LVM on top of a RAID 5 system (hardware RAID controler). I'm using rsync to monitor the transfer speed. At the beginning the IO speed is about 200MB/s, stable for the first 18GB. But then the performance drops by a factor of 10-20 and never recovers to the initial rate. Sometimes it reaches about 50-100MB/s but just for a few seconds and then the process seems to hang for a bit. At the same time all file-stat operations on the target filesystem are blocking for a long time (minutes). Also interrupting the copy process blocks for several minutes, a sub-sequent delete of the partly copied file takes also several minutes. Any ideas what could be causing this?

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• What are best monitoring tool customizable for cluster / distributed system?

  - by Adil

  I am working on a system having multiple servers. I am interested in monitoring some server specific data like CPU/memory usage, disk/filesystem usage, network traffic, system load etc. and some other my process specific data. What are available open source that can serve my purpose? If it provides to customize the parameter to be monitored and monitor your own data by creating plugin / agent. Any suggestions? I heard of Nagios, Zabbix and Pandora but not sure if they provide such interface.

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• Where should I go to learn about networking? [closed]

  - by Ollie Saunders

  I wonder if anyone could recommend resource or resources such as a good book that: explains how all the important protocols work and interact. I’m interested in those that are relevant in a typical home network and used over the Internet explains in detail how ADSL Internet connections work to the level of depth necessary so that I’m able to tweak and measure performance settings starts from the beginning but attempts to provide proper understanding rather than idiot-oriented steps to follow Basically, I’m interested in how these technologies work and tend to be implemented in hardware and software rather than “here’s what to do if…” I’m interested in Computer Networking by Andrew S. Tanenbaum and I wonder if anyone else has any experience with that title. It’s expensive but I could probably loan a copy for £3 from the library or so.

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• HDMI Audio drops out when display enters powersave

  - by Jared Tritsch

  I have a Windows 8 machine with an AMD APU attached to my Home Theater system through HDMI (HDMI routes through a Home Theater AMP, then into the TV). Here's my problem, Whenever the display is interrupted, usually by the TV being turned off or into powersave mode, the audio device lists as "Disconnected" in windows audio devices and I cant get it to re-recognize that the HDMI audio is, in fact, plugged in. The only solution I have found so far is to restart the machine, which will then recognize the device without any problems, until the next time the TV turns off and the problem once again resurfaces. Has anyone else seen this phenomenon? I have no idea if its the GPU, the HDMI interface, the AMP, or even the TV itself, as there really isn't much a way to tell...

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• PostgreSQL disaster recovery options

  - by Alex

  My customer has quite a large (the total "data" folder size is 200G) PostgreSQL database and we are working on a disaster recovery plan. We have identified three different types of disasters so far: hardware outage, too much load and unintentional data loss due to erroneously executed bad migration (like DELETE or ALTER TABLE DROP COLUMN). First two types seem to be easy to mitigate but we can't elaborate a good mitigation plan for the third type. I proposed to use ZFS and frequent (hourly) snapshots but "ZFS" means "OpenIndiana" these days and our Ops engineers do not have much expertise in it, so using OpenIndiana imposes another risk. Colleagues try to convince me that restoring from PostgreSQL PITR backup can be as fast as restoring from a ZFS snapshot but I highly doubt that replaying, say, 50G of archived WALs can be considered "fast". What other options are we missing? Is ZFS an only viable alternative? Can we get a fast Pg DB restore time in the Linux environment?

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• Looking for an easier Skype video chat alternative

  - by Paul

  Is there any software 'easier to use' than Skype - ie to get a video conversation going you have to turn on the computer, make sure the speakers are turned on, make sure the web cam is connected, make sure you click answer with Video... I would like to buy a 'single red button' which does all of the above. - Any recommendations? Update @Eric Koslow comment My original question title was "Is there any software/hardware 'easier to use' than Skype?" So the answer is not necessarily a computer running a program, although it might be. I realise Skype makes a good attempt at helping to ensure speakers and web cam are working and helps you to sort them out if they are not, and for a person who isnt computer phobic this should be enough. However I am interested if there is anything available that is 'easier' than this - ie I'm looking for my 'single' red button. ie the mobile phone with video call maybe the closest answer so far, but I would prefer something as 'free' as Skype is.

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• Open Source Visualization and Dashboard Software

  - by helios

  I am working on an open source Application Performance Monitoring (APM) software and looking for a visualization tool with dashboard capabilities. I came across Graphite which looks pretty good but wondering if there is anything better out there before I settle down with that tool. Here's the list of features I am interested in: Must-Have Open Source license API to submit real time data Web-based visualization interface Persistence - file or database Nice-To-Have Dashboard Capabilities: Allow users to select a few metrics (CPU, Heap Usage, # of Active Users etc.) and place them on a single page for easier monitoring. Any suggestions?

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• Problem with creating table on phpMyAdmin database

  - by tombull89

  Hello all, I'm running a phpMyAdmin Database on my web package on a 1and1-hosted server. I've managed to set up a database in the control panel, have uploaded all to root/phpmyadmin and changed the config.ini.php file to point at 1and1's database server (because that's the way they do it). I can go to the web interface and get to the main page, but all it shows is the database name and I can't find how to create any tables. I know it's a long shot but I'm almost out of ideas. Also, 1and1 have their own phpmyadmin panel, which is pretty annoying to use, and a 1and1 webdatabase which I have barely looked at. Help and suggestions much appriciated.

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• Longlasting Macport installation

  - by user10826

  Hi, I use Macports on Mac OSX to install some software. But there are somethings that I find very strange. For instance, yesterday I installed some app. and the it needed to get gcc43 and compile completely from source! It took a lot of time, although now everything works right. I understand that compilation of everything in the gentoo spirit is eomthing nice, but in the Mac case, not necessary. There are ony sole hardware variations, so it will be easier to get the binaries. I wonder if Macporst can be forced to get the binaries when available and therefore avoid these time consuming compilations. Thanks

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• How do you keep up with Nagios/Capistrano configs when using EC2?

  - by imaginative

  I use Amazon EC2 for my mobile app. Depending on load of the application at a given time, I might spawn new instances and then take them down when load is lower to save costs. How does one keep up with Nagios configurations for such a dynamic environment? When one deals with managed hardware, configuration files are predictable. In this case Nagios, Capistrano and a bunch of other configuration files would need to be added. Capistrano needs to know where to deploy a new build to for an app server. Nagios needs to know to remove an existing instance or add a new instance for monitoring. Nagios also needs to know if a node was intentionally taken down or if the host is down due to error. How is this done with the wonderful world of VPS/dynamic instances?

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• LinkSys WRT54GL + AM200 in half-bridge mode - Setup guide recommendations?

  - by Peter Mounce

  I am basically looking for a good guide on how to set up my home network with this set of hardware. I need: Dynamic DNS Firewall + port-forwarding VPN Wake-on-LAN from outside firewall VOIP would be nice QoS would be nice (make torrents take lower priority to other services when those other services are happening) DHCP Wireless + WPA2 security Ability to play multiplayer computer games I am not a networking or computing neophyte, but the last time I messed with network gear was a few years ago, so am needing to dust off knowledge I kinda half have. I have read that I should be wanting to set up the AM200 in half-bridge mode, so that the WRT54GL gets the WAN IP - this sounds like a good idea, but I'd still like to be advised. I have read that the dd-wrt firmware will meet my needs (though I gather I'll need the vpn-specific build, which appears to preclude supporting VOIP), but I'm not wedded to using it. My ISP supplies me with: a block of 8 static IPs, of which 5 are usable to me a PPPoA ADSL2+ connection

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• Where can I configure wireless to be passed on to the Virtualbox guest?

  - by huahsin68

  I have WinXP install in virtualbox which host in Linux. I have a TP-Link (TP-WN321G) USB wifi adapter and have the driver installed inside WinXP. When I plug-in the wifi adapter, there is an option show "Ralink 802.11g WLAN [0101]" in the virtualbox's USB icon, tick on that option, the Device Manager able to detect the hardware which shows TP-Link, but when look into the properties, it says there is no driver was install. I did try to install Ralink driver but still no luck. Just curious why my wifi adapter is TP-Link, but the option show Ralink? May I know how can I emulate the wireless network inside WindowsXP?

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• Security tips for adding wireless AP to domain network?

  - by Cy

  I am researching best-practices for adding wireless to our existing domain network. My DHCP server is running Windows Server 03 Standard (not sure if thats useful). I am familiar with simple home networking but I thought I'd get some expert advice for the more advanced stuff. Any tips and / or best-practices? Is this Cisco Wireless Access Point a good option? Are there any additional hardware recommendations? Thank you in advance for your help.

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• Macbook Pro (SantaRosa) internal display not detected by graphics card, external monitor OK

  - by BLAU

  My MacBook Pro (2.4 Ghz, Santa Rosa with infamous nVidia card) acts strange. It shows the normal gray screen with Apple logo and animation flawlessly during start up but the internal display goes black without any rendering at all when all is loaded. (shining a light on display show nothing) If an external monitor is connected through the DVI port it will remain black during start up and then show the desktop as the internal display goes black. This happens both while booting to Mountain Lion and Windows XP. I have checked "About my Mac" and only the external display is listed. The same is the case if I use the nVidia Control panel in Windows XP. My questions: Is this a hardware problem or is it related to software maybe even firmware? What controls the display during start up, graphics card or something else?

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• Which Power supply I should buy

  - by arayman

  I am going to buy a new PSU of CORSAIR for my IBM thinkcentre desktop. My previous original PSU was of 230 watts. I have not added any hardware in the CPU. It's in same condition as it was when I bought. On that basis, please suggest which power supply of Corsair and of how many watts will be suitable for me to buy, after referring to the under given weblink. http://www.corsair.com/en/power-supply-units.html Thanks.

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• PC wont boot with more than 1 stick of RAM.

  - by Aidan

  Hi Guys, I've got the following computer and I've just put in a new CPU QX9650 and I've run into this problem since making this hardware change. Whenever I put more than 1 of my 4 sticks of ram into my machine it wont load an OS. It'll go through the BIOS but BSOD on windows load. It also wont let me install an OS from disk or boot into Linux. I've ran memtest with all 4 sticks in and I get 10k+ errors on test5. Each stick of ram on it's own is fine and functions properly. I only have problems when all 4 sticks are in the machine at the same time. System specs.. CPU: QX9650 Mobo: Asus P5B 2104 BIOS RAM: 2xPC25400 DDR2 , 2xPC2 6400 both OCZ. Is the problem on my end or is the CPU faulty?

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• PC wont boot with more than 1 stick of RAM.

  - by Aidan

  Hi Guys, I've got the following computer and I've just put in a new CPU QX9650 and I've run into this problem since making this hardware change. Whenever I put more than 1 of my 4 sticks of ram into my machine it wont load an OS. It'll go through the BIOS but BSOD on windows load. It also wont let me install an OS from disk or boot into Linux. I've ran memtest with all 4 sticks in and I get 10k+ errors on test5. Each stick of ram on it's own is fine and functions properly. I only have problems when all 4 sticks are in the machine at the same time. System specs.. CPU: QX9650 Mobo: Asus P5B 2104 BIOS RAM: 2xPC25400 DDR2 , 2xPC2 6400 both OCZ. Is the problem on my end or is the CPU faulty?

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• Website filtering for OpenVPN clients

  - by Asche

  I am currently trying to block some websites by their domain names for all the clients of my OpenVPN server. My first idea was to use the /etc/hosts file. But, its effects seem to be limited to the host only and not to be taken in consideration by OpenVPN. I then tried to configure bind9 and to interface it with OpenVPN, but that solution was unsuccessful and uneasy to use. After this, I considered using iptables to drop all the packets from/to those websites but that forum thread made me thought otherwise since iptables' behavior with FQDN may generate complex issues. Have you got a solution to block websites for all clients using an OpenVPN server on which I am root?

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