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  • No Wi-Fi after system reboot

    - by ILya
    Something strange is happening... I've installed a Wi-Fi card into my Ubuntu Server 11.04 machine. To configure it I do the following: sudo vi /etc/network/interfaces add: iface wlan0 inet dhcp wpa-driver wext wpa-ssid "Sweet Home" wpa-ap-scan 1 wpa-proto WPA wpa-pairwise TKIP wpa-group TKIP wpa-key-mgmt WPA-PSK wpa-psk <A KEY> auto wlan0 then: $ sudo /etc/init.d/networking restart * Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces * Reconfiguring network interfaces... ssh stop/waiting ssh start/running, process 1522 ssh stop/waiting ssh start/running, process 1590 And my machine successfully gets an ip to my wireless adapter. But after reboot it doesn't get any ip in wireless network. To fix it I run /etc/init.d/networking restart again and all is fine again - it gets an ip. I understand that I simply should add it to my startup scripts to make it work properly, but maybe there is a better way to configure it?

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  • Will an Atheros AR928X work with WPA2?

    - by Tommy
    Basically I need only the answer to above question. Please think of that I am new to linux. For further explanation here is the full story: I have the following problem. My friends notebook (Vista) has got a trojan and refuses to work anymore. The Avira Rescue CD did not help either. So I tried an old (9.1) Ubuntu CD and backed up all the essential files. Since we have no Windows Install Disk we want to put Ubuntu on that notebook. But with the 9.1 version there is no WLAN. Systemtest tells me, that it finds an Atheros AR928X, but ifconfig does not show that and the network manager tells me there are no LAN/WLAN devices. So: does that work easier with the new Ubuntu version or is that network adapter a known troublemaker? And: if I get the adapter to work, will it work with the WPA2-network around here?

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  • Solution to route/proxy SNMP Traps (or Netflow, generic UDP, etc) for network monitoring?

    - by Christopher Cashell
    I'm implementing a network monitoring solution for a very large network (approximately 5000 network devices). We'd like to have all devices on our network send SNMP traps to a single box (technically this will probably be an HA pair of boxes) and then have that box pass the SNMP traps on to the real processing boxes. This will allow us to have multiple back-end boxes handling traps, and to distribute load among those back end boxes. One key feature that we need is the ability to forward the traps to a specific box depending on the source address of the trap. Any suggestions for the best way to handle this? Among the things we've considered are: Using snmptrapd to accept the traps, and have it pass them off to a custom written perl handler script to rewrite the trap and send it to the proper processing box Using some sort of load balancing software running on a Linux box to handle this (having some difficulty finding many load balancing programs that will handle UDP) Using a Load Balancing Appliance (F5, etc) Using IPTables on a Linux box to route the SNMP traps with NATing We've currently implemented and are testing the last solution, with a Linux box with IPTables configured to receive the traps, and then depending on the source address of the trap, rewrite it with a destination nat (DNAT) so the packet gets sent to the proper server. For example: # Range: 10.0.0.0/19 Site: abc01 Destination: foo01 iptables -t nat -A PREROUTING -p udp --dport 162 -s 10.0.0.0/19 -j DNAT --to-destination 10.1.2.3 # Range: 10.0.33.0/21 Site: abc01 Destination: foo01 iptables -t nat -A PREROUTING -p udp --dport 162 -s 10.0.33.0/21 -j DNAT --to-destination 10.1.2.3 # Range: 10.1.0.0/16 Site: xyz01 Destination: bar01 iptables -t nat -A PREROUTING -p udp --dport 162 -s 10.1.0.0/16 -j DNAT --to-destination 10.3.2.1 This should work with excellent efficiency for basic trap routing, but it leaves us completely limited to what we can mach and filter on with IPTables, so we're concerned about flexibility for the future. Another feature that we'd really like, but isn't quite a "must have" is the ability to duplicate or mirror the UDP packets. Being able to take one incoming trap and route it to multiple destinations would be very useful. Has anyone tried any of the possible solutions above for SNMP traps (or Netflow, general UDP, etc) load balancing? Or can anyone think of any other alternatives to solve this?

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  • Broadcom STA driver doesn't work well with BCM4313

    - by Oli
    Following on from my other question about our new Samsung Q330, I've noticed that the wireless is incredibly flakey. It can connect but after a little use, especially if it does a lot of downloading at once (read: install something from the Software Centre), the connection stops working. Network Manager still see the connection, there's just no network throughput. I've simple tests like pinging other local network hosts and they just fail. The Samsung Q330 has a Broadcom BCM4313 wifi card (it's proper ID: 14e4:4727) and it's running on the Broadcom STA drivers that Jockey suggests (it didn't work at all without this). I did try installing b43-fwcutter but this just didn't do anything. I was expecting a configuration screen to come up (to select a firmware) but it never did. This page suggests the newer brcm80211 driver might be able to help, but I don't know how to install that. If you think this is the right route, please let me know how one goes about installing it.

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  • PIN request at each login after update to Maverick

    - by Giacomo Verticale
    I have a netbook with included 3G mobile broadband card (Huawei E620). I have configured the broadband network connection in the Network Manager and it works perfectly. However since Maverick upgrade, a window appears just after login I asking for the SIMcard PIN. This happens every time I log in and did not happen with Lucid. Note that the PIN is stored in the configuration of the mobile broadband connection and Lucid was satisfied with that. Is there a way to prevent this request or, at least, to have the system rember the PIN and stop ansking for it? If it may be useful, the broadband network connection is configured as not being available for other users. Also, I would like to keep the SIMcard asking for the PIN; only I do not want to insert it manually at login.

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  • How to connect the printer HP 2575 to a network?

    - by Peter
    I have 2 PCs and a router and I want to connect my HP 2575 to this network. So, I found a network cable and I connected the printer to the router. I access the router and I can see that the printer is connected. My question is: How can I use the printer, from one of my computer. I tried Add Printer feature, but with no luck. Any ideas?

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  • Need instructions how to create wpa_supplicant.conf and add fast_reauth=0 to it // WPA 2 Enterprise & frequent wlan disconnects

    - by nutty about natty
    Like many other natty users on a university / academic network, I'm experiencing annoying frequent disconnects / hangs / delays. See, for instance: https://bugs.launchpad.net/ubuntu/+source/wpasupplicant/+bug/429370 I would like to learn how to add fast_reauth=0 to the wpa_supplicant.conf file. This file, it seems, does not exit by default, and needs to be manually created first: http://w1.fi/gitweb/gitweb.cgi?p=hostap.git;a=blob_plain;f=wpa_supplicant/README [quote] You will need to make a configuration file, e.g., /etc/wpa_supplicant.conf, with network configuration for the networks you are going to use. [unquote] Further, I installed wpa_gui which probably needs to be launched with parameters, else it's pretty blank... What I'm hoping for is this: That creating a wpa_supplicant.conf file with fast_reauth=0 in it, saving it to the relevant path, will work and make my uni wireless (more or even completely) stable. I read mixed reviews about wicd (as an alternative to the network manager). Also note that on my basic wlan at home (with bog-standard wpa encryption) the connection is stable. Thanks!

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  • How do I map a network drive in Ubuntu? I want to save my Firefox downloads directly in the mapped n

    - by NJTechie
    I work in an environment wherein files are exchanged over email which are then processed into databases. In Windows, mapping a network drive and storing files directly to a folder in the network drive from Firefox/Chrome downloads is a breeze. How to achieve the same in Ubuntu? I don't see the SFTP'ed drive/directory as options in Firefox- Downloads setup. Thanks in advance!

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  • How do I map a network drive in Ubuntu? I want to save my Firefox downloads directly in the mapped n

    - by NJTechie
    I work in an environment wherein files are exchanged over email which are then processed into databases. In Windows, mapping a network drive and storing files directly to a folder in the network drive from Firefox/Chrome downloads is a breeze. How to achieve the same in Ubuntu? I don't see the SFTP'ed drive/directory as options in Firefox- Downloads setup. Thanks in advance!

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  • On a local network, are you able to password protect certain folders and how (in windows xp)?

    - by Derek
    I have a local network set up for my small office which consists of me, the manager, my wife, the secretary, and a few sales people/others. I would like to share passwords over the network and other such things privately to my wife, the secretary, but would not like the sales people and others to have access to it, yet I need the others to have access to other folders/documents that I'd like to share. How would I go about doing this if not by password? Thanks in advance

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  • Cannot get Atheros AR9285 to work on 12.10

    - by user100449
    I've already went through all possible advices and still cannot start my Atheros AR9285 wireless card. I have a laptop Toshiba Portege Z830 where the WiFi already worked under Windows 7. But after migration on Ubuntu 12.10. I'm not able get it work. This is what I see on command lshw *-network UNCLAIMED description: Network controller product: AR9285 Wireless Network Adapter (PCI-Express) vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:02:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:c0500000-c050ffff This is what I see on command rfkill list 0: Toshiba Bluetooth: Bluetooth Soft blocked: yes Hard blocked: no 1: hci0: Bluetooth Soft blocked: yes Hard blocked: no Any idea?

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  • Putting Ubuntu Server on to a networked HDD

    - by SimplySimon
    Firstly, I know very little about servers and secondly the 1Tb HDD I have has network capabilities, but no software is installed on it, so when connected to the computer it is seen as a network connection, but not as a drive. Any advice on how to get started would be great. Up until now, I have been using it as a USB drive which worked well, but when this is sorted, I would like it to be connected directly to our BT HomeHub accessible through the WiFi for all the family to use as a film and back up repository. I would then be able to set up individual accounts for each family member to use and may be, if possible, make it accessible from outside locations. The First question then is: How can I install Ubuntu server on the 1Tb HDD attached directly to the computers network port but which doesn't show up in Nautilus? HDD Western Digital 1.0Tb LBA 1953525168 Model: WD10EACS-00DB0 DCM: DHRNHT2CF

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  • Need instructions on how to create wpa_supplicant.conf and add fast_reauth=0 to it

    - by nutty about natty
    Like many other natty users on a university/academic network, I'm experiencing annoying frequent disconnects/hangs/delays. See, for instance here. I would like to learn how to add fast_reauth=0 to the wpa_supplicant.conf file. This file, it seems, does not exit by default, and needs to be manually created first: README You will need to make a configuration file, e.g. /etc/wpa_supplicant.conf, with network configuration for the networks you are going to use. Further, I installed wpa_gui which probably needs to be launched with parameters, else it's pretty blank... What I'm hoping for is this: That creating a wpa_supplicant.conf file with fast_reauth=0 in it, saving it to the relevant path, will work and make my uni wireless (more or even completely) stable. I read mixed reviews about wicd (as an alternative to the network manager). Also note that on my basic wlan at home (with bog-standard wpa encryption) the connection is stable. Thanks!

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  • How to track a network users accessability on a document?

    - by BigBoy
    We have a document on common folder (Linux as server) on a network which can be accessed by log-in users. Is there way to track the users who really accessed (read/copy operations only) the document? We can log the users who accessed the network, but not sure if they really viewed/copied the document. How can we check this?

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  • What can SNMP be useful for in a small network?

    - by Sanoj
    I have been administering servers and clients in small business offices, and have never used SNMP. But I have read about it and it looks interesting. As what I understand, it is mostly useful if you have a bigger network with a lot of network equipment that should be monitored. Is there any useful use cases for SNMP in smaller networks? And is it recommended that I use it?

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  • Create a HotSpot which requires a username and password

    - by Trumbun
    I wish to set up a wireless access point which requires a username and password in order for clients to use the internet. The network setup will be internet modem connected to an Ubuntu Server (2 networks cards). The first network cards to get the internet to the server and the second network card to connect the the wifi hotspot. The server will host the software such as (Example software for windows) which will control the user connected by forcing them to login with the credentials given at the reception. Can some suggest some software that I can use? Thanks in advance

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  • What is the best way/tool to analyze raw data(network stats) from Simulation?

    - by user90500
    After running a simulation(using a simulator(QualNet)) of a simulated network I end up with ip stats stored in a database, I then extract the data to a csv file So now I have 750mb of raw network stats(time stamp, packet id, source ip, source port, protocol, etc). What are the common ways of analyzing large amounts of data like above, if you want to know things like packet loss, throughput, delay, congestion, etc.

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  • Setting up a linux server to share an internet connection.

    - by Skizz
    I in the process of reconfiguring my network. It is currently like this: internet - modem - wireless router - wired server/clients | |---- wireless clients but I need to move the router to get a better signal for the wireless clients. So, I'm looking at this: internet - modem - server - switch - wired clients | |---- wireless router - wireless clients How do I set up the server to enable this? Also, what set ups do the clients need. The server is Ubuntu 9.04 and the clients are a mix of Windows XP / 7, Ubuntu and printers. I believe this new set up will allow me to control access to the internet, which would be useful.

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  • How to connect Android phone to a Wifi network using PPPoE?

    - by Slavo
    I have an ISP at home, which provides me with a PPPoE connection. My router supports that and I've configured it to autoconnect periodically, so I don't have to type my username and password each time. When I connect to the Wireless router from the PC, I have internet and everything works fine. However, when I do so using my Android phone, there's no internet connection on the phone. It connects to the router, but I cannot open any web page. How can I enable internet access from such an ISP on my phone? Is it something in the router setup? The router is Linksys WRT54GL.

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  • Connecting a print/file server with no wired access

    - by PeanutsMonkey
    We currently have a printer server which also serves as a file server. The server is located on premise however is not close to any wired access point i.e. a patch panel or point. The server also requires access to the Internet as it transmits files across. We have a wireless modem and a wireless router. I can run a cable between the server and wireless router. How can I have the wireless router communicate with the wireless modem? If the operating system of the server is concerned, it is running Windows Server 2003.

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  • Can't connect to Internet through WiFi, but can with cable

    - by aldy505
    I'm using Windows 7 32-bit, Toshiba Portege laptop. I want to connect to the WiFi, usually I can do that easily. But, I don't know.. maybe when I tried to install a Microsoft Research: Mesh Virtual WiFi that could connect more than 2 wireless networks. I wanna try in connecting both Wireless router and my personal Ad-Hoc. Now, my laptop don't recognize my WiFi, well, I can connect to the WiFi but it says: "Limited access" and doesn't really connect to the internet. But when I plug the LAN cable, it works. I know the problem is in the laptop's wireless connection or in the properties. Any help for this? UPDATE: The IP and DNS settings, I set to automatic, and when I ran diagnostic, Windows tells me that the wireless network adapter is the problem, but they told me to insert the LAN cable, so how to fix the wireless? They didn't tell me how to fix that.

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  • What would cause a single working website to not work on 1 out of 5 devices on a network?

    - by th3dude
    There is a specific website that loads up without problem on all machines on my network (both wired and wireless) except one laptop. This laptop is a Windows 7 machine that was just recovered using the recovery partition, so it is fresh. The site will not load in Firefox 3.6 or IE 8. The website is http://www.weightwacthers.com The site loads fine on my desktop, iPhone, and Droid, but not the laptop. In all my years in this business I've honestly never seen this happen. Also, 'Is it down for me or everyone' reports that it is indeed only me. What would cause this to happen?

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