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• Cannot reset an network interfaces without a reboot

  - by yangchenyun

  I have edited the /etc/network/interfaces file and I use the sudo /etc/init.d/networking restart. After restart, the eth1 interfaces don't setup properly. I need a hard reboot to enable this configuration. Meanwhile the command line hints: Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces. Am I using the run command to restart network interfaces? auto eth1 iface eth1 inet static address 192.168.1.87 netmask 255.255.255.0 gateway 192.168.1.1

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• Suspected network performance issue on VirtualBox Ubuntu guest on Win7 host

  - by Adam

  I set up Ubuntu 12.04 in VirtualBox on the Win7 machine I was allocated on my new project. I am running Java, Eclipse, Tomcat to develop a large data-intensive application and I noticed that this application runs at half the speed of my colleague's identical machine, where he runs it all under Windows. I think I have narrowed down the performance issue to the network, after comparing and equalising all the Java VM settings with my colleague. Is there a ping test I can do or some other network diagnostic test to flag up any problems? To give some background, the network performance is confusing. Running a network speed test to my colleague's machine with iperf shows speeds of 6 Mb/s from my Ubuntu guest, and 90 Mb/s from the win7 host. Large downloads, e.g. the Java SDK, come down at about 1.2 MB/s on both the guest and the host. Pings are sub-1ms on the host, but 1.5ms on the guest. I also did a broadband speed test, and got 10Mb/s download speed on both, but the host has an upload speed of 10Mb/s but the guest only uploads at 3Mb/s. I've been trying to diagnose any MTU problems with ping -M do to identify any kind of packet fragmentation problem but it's progressing very slow because I don't have much experience in this area. From what I read on other people's networking issues with VB and Linux guests on Win7 hosts, I should be able to get the speed on the guest up to the same level as the host. I installed a fresh VM with Ubuntu again to see if I'd foobar'd it somehow, but I'm getting the same readings with iperf on the virgin installation. My setup is: Adapter 1: Intel PRO/1000 MT Desktop (NAT) Adapter 2: ditto (host-only adapter) eth0 Link encap:Ethernet HWaddr 08:00:27:0b:76:bf inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fe0b:76bf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:86236 errors:0 dropped:0 overruns:0 frame:0 TX packets:49369 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:69163946 (69.1 MB) TX bytes:3530535 (3.5 MB) eth2 Link encap:Ethernet HWaddr 08:00:27:a3:26:b8 inet addr:192.168.56.101 Bcast:192.168.56.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fea3:26b8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:59 errors:0 dropped:0 overruns:0 frame:0 TX packets:57 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9148 (9.1 KB) TX bytes:7648 (7.6 KB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:701 errors:0 dropped:0 overruns:0 frame:0 TX packets:701 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:66321 (66.3 KB) TX bytes:66321 (66.3 KB)

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• My network drive disappears from Mac OS Finder

  - by Mariusz

  I have recently bought a Netgear WNDR3800 router to use it in my home network. But just the same day I installed it, I noticed a strange behaviour of Finder and iTunes. Let me explain it further. There is a Synology DS111 NAS attached to that router and two Macs with Mac OS X Lion. One of them is connected by a cable and the second one wirelessly. Before I changed my router to the new one I mentioned above, Finder always used to display my NAS on its sidebar. So I could just click its network name to access shared folders existing on it. But after I installed WNDR3800, I can no longer access the NAS that way. It is no longer displayed. I always have to mount it manually by typing its IP address using the Finder's 'connect to server' option. The same NAS supports TimeMachine backups and has an inbuilt DLNA server. And the same situation here. I can't perform a backup because my NAS is no longer accessible in TimeMachine preferences. iTunes does not display it as well (as a multimedia server) even though it used to before I installed that router. What's important, everything works fine for a couple of minutes after I restart the router or the NAS. Or even when I change the NAS's IP address it becomes accessible again in Finder, TimeMachine and iTunes, but only for some time. Both the Mac computers I mentioned behave the same way. And all those issues have been taking place sice I installed that new router. Before I did that, everything had worked fine. My old router was Netgear WGR614v10. Would you be so kind to tell me what you think could possibly be the reason of that behaviour? What settings of the router should I look closer at? I'm not a network specialist, but is it possible that some network packets are blocked for some reason? I will be grateful for any clues you give me. Thank you.

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• Network Time is being set by "something"

  - by AliGibbs

  Something is setting (the incorrect) time on our network- though I don't know what it is (since we have approx 40 servers). We run on a windows network, with AD etc. Not sure where to even begin to start looking- as far as I know, we don't run an NTP server in house. Any advice? Thanks

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• Remote Desktop from Linux to Computer that Requires Network Level Authentication

  - by Kyle Brandt

  Is there a way to use rdesktop or another Linux client to connect to a server that requires Network Level Authentication? From Windows Server 2008 R2 -- Control Panel -- System And Security -- System -- Allow Remote Access there is an option that says "Allow connections only from computers running Remote Desktop with Network Level Authentication". So with this enabled I can con not connect from Linux. I can connect from XP but you need SP3 and I had to edit a couple of things in the registry for it to work.

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• Discovering proxy servers on a private network

  - by AIB

  Suppose that I am in a private network of computers (say each having ip addresses 192.168.. ). Some of the machines( we have no information regarding their ip, name and no physical access to the servers) in the network are connected to internet and they run an http proxy at some port say 3128. Is there a program which can be run on Windows or Linux which will give me the list of machines(ip addresses and ports if possible) acting as proxy servers?

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• How to monitor network interface card utilization ?

  - by kashyapa

  I want to check the utilization of the network interface card while running a communication-intensive benchmark . Can anybody tell me which unix/linux command I can use to monitor the network traffic ?

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• Network information displayed in Linux Console

  - by Bastien974

  Hi all, I have a Fedora 10. NetworkManager is stopped. Network is configured with a static ip address. On my screen i have this : How do i disabled that network information output ? I don't see it on SSH, only the main console. Thanks !

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• default virtual network interface

  - by Zulakis

  I got a single ethernet connection to a network but need multiple ips. Because of this, I am using virtual network interfaces like this: auto intern iface intern inet static address ... netmask ... gateway ...U auto intern:1 iface intern:1 inet static address ... netmask ... gateway ... I need to specify which IP should be used by default for outgoing traffic. How can I do that?

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• FC SAN network high-error rate simulation

  - by Wieslaw Herr

  Is there a way to simulate a malfunctioning device or a faulty cable in a FC SAN network? edit: I know shutting down a port on a switch is an option, I'd like to simulate high error rates though. In an ethernet network it would be a simple case of adding a transparent bridge that discards a given percent of the packets, but I have absolutely no idea how to tackle that in an Fibre Channel environment...

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• Can't turn off Network Discovery

  - by skevar7

  I choose this option in network profile, turn it off, press save settings, and all seems ok. But when I open this network profile again, it shows that this option is on. WTH?

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• Wired and wireless network file sharing

  - by Megan

  I have connected my Internet to a buffalo air station router and a swtich. Computers and Laptops on this network connect to the Internet wired and wirelessly. I would like to share files locally on this network but I can't access the laptop's which connect wirelessly. I have shared folders on each computer but I would like to know if local file sharing is possible as all the computers utimately connect to the same router. All computers are running Windows 7.

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• PC cannot ping another PC on my home network

  - by Mike C.

  Hello, I am running Windows 7 on my PC, and I am running a Windows 2008 Server VM in Windows Virtual PC. Both machines have network connectivity. However, I cannot ping the VM from the host neither by computer name nor IP. I can ping the host machine from the VM both by computer name and IP. Is there something I need to enable on the VM to allow it to be seen by other machines on my network? Thanks!

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• Reset network (airport) connections from the command line

  - by Klaus Byskov Hoffmann

  I have this MacBook Pro that has intermittent problems connecting to my Wifi network. Sometimes it helps to disable/re-enable airport and sometimes I have to restart the computer to get my network running again. Has anyone experienced this? And is there a command I can run that would do the same as I do when I restart the computer (short of actually restarting it, obviously) or at least a command that restarts the airport service? Thanks in advance.

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• How to share internet over network

  - by abc

  i have a machine connected to internet, i want to set up proxy server or any other configuration that can help me to share internet over other machines in the same network machine may be of diff. platform (linux,mac, , windows), and server can be (either linux or windows) so how to configure now.. all machine are in network. Thanks

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• Replacing hard drives in a LaCie 2big Network

  - by Jason

  I have a LaCie 2big Network that currently has 2 500GB drives in it (mirror). I'd like to upgrade the drives to 1TB each using something like this I know that Lacie sells a 1TB drive designed for the 2big Network but it would seem to me that these drives are standard drives with the Lacie holder included. Do I need to use their drives or can I get my own? (Their customer support pushes me towards their drives) I'm assuming the device can format the drives for me when I add them in.

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• How to map network shares at login on server 2003

  - by brennanag

  I am trying to map a couple network shares for anyone who logs in to the domain under their AD credentials. I had this setup before, and now I can't get it to work at all... so frustrating. I'm trying putting the logon script under the user's profile, putting the logon script under the Group Policy Object logon script section. Please help, none of the network shares are being mounted.

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• how to set up a git repository which can be accessed by network in ubuntu 12.10

  - by hguser

  Now we want to set up a private git repository in the ubuntu 12.10,then other developments can access it through the local network. Now I just can create a repository use git init,for example: cd myproject git init Which will create .git directory,but I do not know how to access it thougth network like: git://192.168.1.1/myproject/.git Any idea? BTW,I have tried: git init --bare which will give me a error: git add error : "fatal : malloc, out of memory"

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• Windows 7 Event 431, NetBT every computer name on network (Mulitpule)

  - by Beuy

  A users Windows 7 laptop is throwing Event 4321, NetBT errors every two minutes. It is trying to register every DNS name on the network to it's own interface. While there is alot of discussion on single instances of this I have never seen it do it for every computer name in the network. Any thoughts?

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• Linux (samba) computer not coming in window vista Network but is accessible

  - by Mirage

  When i click on network in window vista i can't see LInux computer in there but when i go to my shared folder using \\linux-server\\samba_shared_folder then it works How can make the linux computer visible to all in network

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• Make a temp network.

  - by giodamelio

  I have a XAMPP test server running on my Windows Vista laptop. I also have a small wireless router. I would like be able to create a small temp network that could broadcast that network so any other computers connected to the wifi can go to localhost/ or an internal ip address and view my server. The router will not be able to be connected to the internet, but I don't see how that would make a difference Thanks giodamelio

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• Network Traffic Troubleshooting Program

  - by lamagra

  All, I am having intermittent network issues that I am having an issue troubleshooting. The issue is outside of my network on one of the hops in my local area. I was wondering if you all knew of a good windows based program that would monitor/log a tracert or something of that nature. Thanks

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• Making many network shares appear as one

  - by jimbojw

  Givens: disk is cheap, and there's plenty lying around on various computers around the corporate intranet redundant contiguous large storage volumes are expensive Problem: It would be fantastic to have a single entry point (drive letter, network path) that presents all this space as one contiguous filesystem, effectively abstracting the disk and network architecture from the paths presented to users. Does anyone know how to implement such a solution? I'm open to Windows and non-windows solutions, free and proprietary.

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• Juniper Network Connect (VPN) on Windows 7

  - by Virat Kadaru

  My company uses Juniper networks for vpn access. I am unable to get the juniper network connect client to work on windows 7 64-bit. It used to work before but after I formatted my system it gives the following error every time I start the vpn client If I check the logs I see this error The Juniper Network Connect Service service is marked as an interactive service. However, the system is configured to not allow interactive services. This service may not function properly.

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• No network connection and error

  - by PS

  My PC keeps reporting the following error in the event viewer around every 10-15 minutes: Faulting application , version 0.0.0.0, faulting module unknown, version 0.0.0.0, fault address 0x00000000. Whenever it happens, the XP theme change to classic theme then change back to the normal theme. The network goes down and I must restart PC for the network to come back online. What could be causing this and how do i fix it?

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