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• tradeoffs of iSCSI vs. AFP when using Time Machine with a NAS?

  - by Ajit George

  I'm setting up a home NAS device (Synology DS409) that I'm planning to use for Time Machine backups (amongst other things). What are the tradeoffs between using iSCSI or AFP to mount the backup volume? The Synology wiki suggests that iSCSI is better if the Mac will be frequently disconnected from the network or sleeping, from the point of view of the volume automatically remounting. What about filesystem consistency? Given that unplugging a USB drive without properly unmounting it often requires the Time Machine volume to be repaired, would iSCSI have the same issues?

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• Monitor Bonded Interface for Disconnection

  - by bradlis7

  I am trying to monitor for network failures on a machine, and one portion of that is to monitor interfaces that are intended to be active also be "RUNNING". An Ethernet port, such as eth0, will say "RUNNING" if it is physically connected to another device. The problem lies in the bonded interfaces, such as bond0. If all of the ethernet devices are disconnected, it still says that it is running, and it is still pingable. Is this by design, or is my system setup incorrectly? Does the miimon option have something to do with this?

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• Link bonding across multiple switches?

  - by Bryan Agee

  I've read up a little bit on bonding nics with ifenslave; what I'm having trouble understanding is whether there is special configuration needed in order to split the bonds across two switches. For example, if I have several servers that all have two nics each, and two separate switches, do I just configure the bonds and plug 1 nic from each into switch #1 and the other from each into switch #2? or is there more to it than that? If the bonds are active-backup, will a nic failure on single machine mean that server may become disconnected since the rest of the machines are using the primary nic and it's using the secondary? Or do you link the switches with one cable as well?

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• Laptops trying to connect via wireless? Only able to connect only via wired connection

  - by Chris J. Lee

  It seems that all the wireless laptops in the office have disconnected and are unable to reconnect to the wifi after a terrible storm caused some power interruptions. Troubleshooting actions Verify wireless broadcasting is up With each laptop i ended up flushing their dns cache on Win 7 (ipconfig /flush ) Performed an ipconfig /all to see what the new ip is Made sure password was correct Reset the router (multiple times) restarted each laptop. Tried connecting wirelessly Am i missing some small detail ? Network information The router is a linksys/cisco WRVS4400N router. Supports a lot of fancy features i don't know how to use. We have 3 static ip's the conference room computer, the wireless printer, my computer Mostly windows machines, we have 3 mac users

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• ARP replies contain wrong MAC address

  - by Jayen

  I've got a robot running linux with wired and wireless adapters. When I boot up, it connects to the wireless fine. When I assign an IP to the wired (either statically or with DHCP), it looks like it works. As in, ifconfig shows a proper IP and route shows proper routes. However, when I do an ARP request of the wired IP, the ARP reply contains the wireless MAC. ??? There's no bridge running on the robot, so why don't I get the wired MAC??? When the wire is disconnected, the wired IP replies to ping... Why is the robot replying over the wireless interface to IP requests on the wired???

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• Cat5 wiring in my home [closed]

  - by Mike

  I have problem with cat5 cabling First I ran a length of cable 30 metres to my bedroom 1 and and connected both ends to a wall sockets internally using my punch down tool, both ends look fine. I also ran a cable from bedroom 1 to bedroom 2 so my son can use same internet connection , i then parallel connected my cables in bedroom 1 against using punch down tool using same colours all the way through. I ran a Ethernet cable from modem to first wall socket close to it then at bedroom end used another Ethernet cable to connect pc, it wouldn't connect to pc so I disconnected bedroom 2 cable from bedroom 1 socket. I connected bedroom 1 to pc and it worked, but how do I connect bedroom 2 (obviously cat 5 cable bedroom 1 to 2 is in place) As soon as I connect one wire from bedroom2 I loose Internet connection!

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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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• Does Cisco anyconnect replace original network connection session?

  - by Stan

  When using Cisco anyconnect VPN, it seems the existing network connection is still going through old connection session (Is there any way to find out)? The reason is because when using Cisco VPN client connect to gateway, usually the Messenger Live, Skype will be disconnected and requires to reconnect. But using anyconnect doesn't need to reconnect. So I am guessing if those old sessions still go through original network connection. Which means, both connection is existing at the same time. Take my case for example: connection 1: wireless NIC - cable modem - my cable ISP - internet connection 2: anyconnect - wireless NIC - cable modem - my cable ISP - VPN gateway - internet Am I correct? Is there any way to check this? Thanks.

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• How to show disconnect network drives

  - by Jake

  Windows 7 and Vista laptops in my company domain has network drives set up by Win2k8 Server GPO. Normally, when the laptops has ethernet cable plugged in before boot, the network drives connect and appear as expected at the end of startup sequence. However, when the laptop has ethernet cable unplugged, the network drives are not connected, which is fine, but the disconnected icons disappear as well. i.e. the drives are not set up. At the end of the startup sequence, upon reaching desktop, the wireless adapters will connect to the network and the laptop will be able to find the network drive. Hence I want the drives to be setup nonetheless, so that the next attempt to connect, say, via a desktop shortcut, will reestablish the network drive connection. How can this be done?

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• my WD Mybook wd5000h0032 is DEAD?

  - by Herudae

  Hello, i have a WD Mybook Premium (wd5000h032) it used to work just fine but suddenly i can't access to it. The blue lights turn on but the drive doesn't start, it makes no click, nor any other sound, it just like if it was disconnected from USB, of course my PC doesn't detect it, i've tried with trhee different USB cables two PCs and one laptop and nothing. Is it really dead? how can i recover the information stored there? i think the problem could be the case, if so, could i take out the disk and connect it as an internal drive? or could i buy another case?

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• How do I run a batch file async using PSExec?

  - by Paul Mrozowski

  I have a batch file I run that, among other things, reset's the NICs in the machine. I have some watchdog software running on another machine that monitors the first one. I'd like to run this batch file using PSExec when it detects certain types of failures. The problem I'm having is that since the batch file reset's the NIC's it kills the connection PSExec has (I'm OK with that). The real issue is that when PSExec dies the batch file stops running (leaving the NIC's disabled). I've tried using the -i option with PSExec with no luck. Any ideas about basically just fire off the batch file and NOT have it stop when PSExec is disconnected?

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• Host hijacks USB printer from VirtualBox machine

  - by jackhab

  I have Ubuntu 9.1 running Windows XP in VirtualBox. Windows XP is a print server (there is no Linux driver for our printer). The printer is connected via USB and its USB filter is added to virtual machine settings. The problem is that every several hours Ubuntu tries to access the printer (trying to install it) and disconnects it from the virtual machine. The printer remains disconnected until I connect it again manually. I thought it is a problem with Windows power management but disabling sleep/standby in Windows didn't help. Please, advise.

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• Ubuntu SSH issue

  - by palani

  0 Hi, I have the ubntun machine... under my /home/user/.ssh i have my id_rsa.pub key... i carefully copied that key and paste my key to respository Git account. After that i try to connect from locat system to my git respository i got the following error warning: Authentication failed. Disconnected; no more authentication methods available (No further authentication methods available.). . I removed SSH in system and re-enable and did agin.. but no luck.... I have no idea what's happening with my SSH key ....can any one please tell me on this... Note : i noticed in my home /home/user/.ssh && /home/user/.ssh2

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• Ubuntu SSH issue

  - by palani

  Hi, I have the ubntun machine... under my /home/user/.ssh i have my id_rsa.pub key... i carefully copied that key and paste my key to respository Git account. After that i try to connect from locat system to my git respository i got the following error warning: Authentication failed. Disconnected; no more authentication methods available (No further authentication methods available.). . I removed SSH in system and re-enable and did agin.. but no luck.... I have no idea what's happening with my SSH key ....can any one please tell me on this... Note : i noticed in my home /home/user/.ssh && /home/user/.ssh2

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• Outlook 2007 disconnecting after sending email to specific email

  - by Michael

  So when a user emails another tech in my domain they get the prompt for username/password as though they got disconnected. I have not seen any issues in the event logs, tried deleting the email address from his auto correct, ran Outlook in safe mode and searched online as well. I am kind of lost. Checked the event logs on the exchange server as well in the security and still nothing. Exchange 2010, Client OS: Vista x64, Outlook 2007. Thanks!

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• Aventail VPN connection doesn't work

  - by Warlax

  I installed the Aventail VPN client on both the Mac and a Windows 7 machine, both on my home network. When I try to connect one or the other (I make sure one is disconnected before connecting through the other machine), I get a connection and view the correct certificate - accept it and Aventail tells me that I am connected. However, accessing any page inside my company's network is only possible on Windows. On the Mac I get this page: It looks like my ISP doesn't know how to redirect me? Maybe something about my DNS being set incorrectly on the Mac? Our helpdesk has been completely useless.

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• How should I troubleshoot a problematic wireless connection on Linux?

  - by Gearoid Murphy

  I recently purchased a netgear 150 usb wireless dongle for use with my 11.10 Xubuntu amd64 system. Using the network-manager interface, I can see local wireless networks and enter the authentication details for my local wireless lan. Unfortunately, the connection does not seem to work, I keep getting notifications that my wireless has disconnected (but none indicating that I've connected). When I examine syslog, it seems to indicate that I've successfully associated with the wireless switch and that dhcp has successfully acquired an ip address but the log shows that the dhcp process keeps sending requests, eventually dropping the connection. 'ifconfig wlan0' never shows the dhcp address logged in syslog. I suspect that the problem lies with the usb dongle, my configuration or the wireless switch but I am not certain how to isolate the problem, can anyone provide some insight on how I should go about homing in on the cause of this problem or verifying the functionality of the individual components, thanks.

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• Windows: "net use" equivalent that shows the username used to mount a share?

  - by Jeroen Wiert Pluimers

  Sometimes you need to use different credentials to map different shares, for instance net use z: \\myserver\myshare /user:mydomain\myusername mypassword You can use net use to show you the shares that are mapped, but it does not show the mydomain\myusername. What can I use to show that information? I'm looking for output like this from the imaginary command NetUseX: H:\>NetUseX New connections will be remembered. Status Local Remote Username Network ---------------------------------------------------------------------------------------------------------- OK D: \\MyServer1234\SomeData MyServer1234\MyUserA Microsoft Windows Network Unavailable E: \\MyServer4321\SomeApps MyDomain\MyUserB Microsoft Windows Network OK H: \\MyServer4321\HomeDAta MyDomain\MyUserB Microsoft Windows Network Disconnected W: \\MyServer6789\WorkData MyDomain\MyUserB Microsoft Windows Network OK \\MyServer9876\Shortcuts MyServer9876\MyUserC Microsoft Windows Network The command completed successfully.

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• SSH authentification with public key fails

  - by palani

  I have my id_rsa.pub key under my /home/user/.ssh. I carefully copied that key and paste my key to respository Git account. While trying to connect from my local system to my git respository, I got the following error: warning: Authentication failed. Disconnected; no more authentication methods available (No further authentication methods available.) I removed SSH in system and re-enable and did again, but no luck. I have no idea what's happening with my SSH key. Can any one please tell me on this? Note : I noticed in my home /home/user/.ssh && /home/user/.ssh2

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• Wireshark does not see interfaces (winXP)

  - by bua

  Short story: Wireshark is working....on my winXP-32b ... usage .... Long long time later Wireshark does not work It can't find any usefull interface (just VPN) ipconfig /all Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Description . . . . . . . . . . . : Dell Wireless 1490 Dual Band WLAN Mini-Card Physical Address. . . . . . . . . : SOME VALID MAC Ethernet adapter eth0: Connection-specific DNS Suffix . : xxxx Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Controller Physical Address. . . . . . . . . : SOME VALID MAC Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 192.168.12.68 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168..... ..... Ethernet adapter Local Area Connection: Media State . . . . . . . . . . . : Media disconnected Description . . . . . . . . . . . : Fortinet virtual adapter Physical Address. . . . . . . . . : SOME VALID MAC Following steps didn't help: Several Wireshark re-installation Several LIBPCAP re installation SP3 for winXP Any ideas welcome.

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• Netgear genie says my Internet is off, while Windows claims I am connected

  - by Manu

  I'm connected via wifi to my ISP's router/modem. While Windows says that I'm always connected, I keep getting messages from Netgear Genie that I've lost contact to the Internet, and I cannot access webpages until it comes back. There are two other computers in the house, one connected to the router via ethernet, the other via wifi, both seem to have no such problems. I've wondered if Netgear genie itself was the problem, but I am regularly disconnected even if I uninstall it. And I'd rather have it since it accurently tells me if I'm connected or not. Why does windows says I'm online if I can't access any online game, or website ? Is "netgear genie" the problem ? I've removed the connection, recreated it, I've even copied the settings to a usb key from the computer that has wifi access.

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• Windows 7 "Could not reconnect all network drives" on boot

  - by Thermionix

  Windows 7 won't reconnect to my network drives on startup. Once it is done booting opening Windows Explorer and clicking each share will mount them. Windows 7 Enterprise N Service Pack 1 I have attempted formatting the windows machine - first thing done to machine was to map the network drives, upon reboot they were disconnected. It is running on an Crucial M4 64gb SSD. The host of the network shares is a Ubuntu-Server machine connected through a gigabit switch. A modem provides dhcp, although both these machines have static IP's defined. It won't reconnect the drives regardless of whether they're SAMBA shares or NFS shares - therefore I believe it's an issue with the windows machine. Ubuntu 11.10 (GNU/Linux 3.0.0-12-server x86_64) I've tried using ip address instead of netbios name for mapping shares on the windows machine, Also tried setting EnableLinkedConnections=1 gpedit.msc Computer Configuration - Administrative Templates - System-Logon - always wait for the network at computer startup and logon = yes

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• Ubuntu Connect Button Disabled, cannot connect

  - by CSharperWithJava

  I'm trying to connect to my school network from Ubuntu 12. The network is WPA encrypted and I can connect just fine if the network manager establishes a connection automatically. However, when I get disconnected and try to reconnect a username and password prompt pops up. The credentials are already stored and are autofilled in correctly, but the Connect button is disabled so I can't actually connect to the network. What can I do? The only guess I've found so far is the password is too short and Ubuntu is expecting a full WPA key. I don't administer the school network though so I certainly can't change that.

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• Random Server shutdown? - CentOS

  - by Kevin Hammett

  My system was working fine, and then it just had a random restart. Anyone have any idea of the problem? The message log: Jul 6 22:56:34 909I7 shutdown[719711]: shutting down for system halt Jul 6 22:56:34 909I7 init: Switching to runlevel: 0 Jul 6 22:56:35 909I7 smartd[10743]: smartd received signal 15: Terminated Jul 6 22:56:35 909I7 smartd[10743]: smartd is exiting (exit status 0) Jul 6 22:56:42 909I7 hcid[8749]: Got disconnected from the system message bus Jul 6 22:56:42 909I7 auditd[8430]: The audit daemon is exiting. Jul 6 22:56:42 909I7 kernel: audit(1341640602.922:344412): audit_pid=0 old=8430 by auid$ Jul 6 22:56:43 909I7 pcscd: pcscdaemon.c:572:signal_trap() Preparing for suicide Jul 6 22:56:43 909I7 pcscd: hotplug_libusb.c:376:HPRescanUsbBus() Hotplug stopped Jul 6 22:56:44 909I7 pcscd: readerfactory.c:1379:RFCleanupReaders() entering cleaning f$ Jul 6 22:56:44 909I7 pcscd: pcscdaemon.c:532:at_exit() cleaning /var/run Jul 6 22:56:44 909I7 kernel: Kernel logging (proc) stopped. Jul 6 22:56:44 909I7 kernel: Kernel log daemon terminating. Jul 6 22:56:45 909I7 exiting on signal 15

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• Auto-connect Bluetooth headphones in Windows 7 64bit

  - by CptSkippy

  I have a pair of bluetooth headphones that I've successfully paired with my Windows 7 64bit machine and audio plays through them without a hitch. On the Device Stage under the properties of the headphones in troubleshooting it shows "last connected" as "currently connected" even if I power cycle the headphones or after a reboot of my computer. So the Windows bluetooth stack has no trouble finding them. The problem I have is that whenever the headphones reconnect to my pc they show up as disconnected in the Sound Settings and no sound is routed to them until I manually connect them. I have to go into Sound Settings, then from the Playback tab right click on the headphones and choose the Connect option. Is there a way to make the Sound Settings connect automatically whenever the headphones are available to Windows?

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